diff --git a/Library/Homebrew/cmd/install.rb b/Library/Homebrew/cmd/install.rb
index 644415950e..ec0c4ca6f2 100644
--- a/Library/Homebrew/cmd/install.rb
+++ b/Library/Homebrew/cmd/install.rb
@@ -310,7 +310,7 @@ module Homebrew
         Install.perform_preinstall_checks_once
         Install.check_cc_argv(args.cc)
 
-        formulae_installer = Install.get_formulae_dependencies(
+        formulae_installer = Install.formulae_installer(
           installed_formulae,
           installed_on_request:       !args.as_dependency?,
           installed_as_dependency:    args.as_dependency?,
@@ -337,7 +337,7 @@ module Homebrew
         )
 
         if args.ask?
-          dependants = Upgrade.get_dependants(
+          dependants = Upgrade.dependants(
             installed_formulae,
             flags:                      args.flags_only,
             ask:                        args.ask?,
@@ -354,7 +354,7 @@ module Homebrew
             dry_run:                    args.dry_run?,
           )
 
-          formulae_dependencies = Install.get_hierarchy(formulae_installer, dependants)
+          formulae_dependencies = Install.collect_dependencies(formulae_installer, dependants)
           # Main block: if asking the user is enabled, show dependency and size information.
           Install.ask_formulae(formulae_dependencies, args: args)
         end
@@ -364,7 +364,7 @@ module Homebrew
                                  verbose: args.verbose?)
 
         unless args.ask?
-          dependants = Upgrade.get_dependants(
+          dependants = Upgrade.dependants(
             installed_formulae,
             flags:                      args.flags_only,
             dry_run:                    args.dry_run?,
@@ -381,7 +381,7 @@ module Homebrew
           )
         end
 
-        if dependants
+        if dependants.present?
           Upgrade.upgrade_dependents(
             dependants, installed_formulae,
             flags:                      args.flags_only,
diff --git a/Library/Homebrew/cmd/reinstall.rb b/Library/Homebrew/cmd/reinstall.rb
index 01e44115f8..7a65ea3251 100644
--- a/Library/Homebrew/cmd/reinstall.rb
+++ b/Library/Homebrew/cmd/reinstall.rb
@@ -130,13 +130,13 @@ module Homebrew
         unless formulae.empty?
           Install.perform_preinstall_checks_once
 
-          formulae_keg = formulae.map do |formula|
+          formulae_kegs = formulae.map do |formula|
             if formula.pinned?
               onoe "#{formula.full_name} is pinned. You must unpin it to reinstall."
               next
             end
             Migrator.migrate_if_needed(formula, force: args.force?)
-            Homebrew::Reinstall.get_formula_to_reinstall(
+            Homebrew::Reinstall.formula_installer(
               formula,
               flags:                      args.flags_only,
               force_bottle:               args.force_bottle?,
@@ -153,7 +153,7 @@ module Homebrew
           end
 
           if args.ask?
-            dependants = Upgrade.get_dependants(
+            dependants = Upgrade.dependants(
               formulae,
               flags:                      args.flags_only,
               ask:                        args.ask?,
@@ -168,15 +168,15 @@ module Homebrew
               verbose:                    args.verbose?,
             )
 
-            formulae_dependencies = formulae_keg.map(&:formula_installer)
+            formulae_installer = formulae_kegs.map(&:formula_installer)
 
-            formulae_dependencies = Install.get_hierarchy(formulae_dependencies, dependants)
+            formulae_dependencies = Install.collect_dependencies(formulae_installer, dependants)
             # Main block: if asking the user is enabled, show dependency and size information.
             Install.ask_formulae(formulae_dependencies, args: args)
 
           end
 
-          formulae_keg.each do |f|
+          formulae_kegs.each do |f|
             Homebrew::Reinstall.reinstall_formula(
               f,
               flags:                      args.flags_only,
@@ -195,7 +195,7 @@ module Homebrew
           end
 
           unless args.ask?
-            dependants = Upgrade.get_dependants(
+            dependants = Upgrade.dependants(
               formulae,
               flags:                      args.flags_only,
               force_bottle:               args.force_bottle?,
@@ -210,7 +210,7 @@ module Homebrew
             )
           end
 
-          if dependants
+          if dependants.present?
             Upgrade.upgrade_dependents(
               dependants, formulae,
               flags:                      args.flags_only,
diff --git a/Library/Homebrew/cmd/upgrade.rb b/Library/Homebrew/cmd/upgrade.rb
index 52fe6e4f76..ff6b344054 100644
--- a/Library/Homebrew/cmd/upgrade.rb
+++ b/Library/Homebrew/cmd/upgrade.rb
@@ -220,7 +220,7 @@ module Homebrew
 
         Install.perform_preinstall_checks_once
 
-        formulae_installer = Upgrade.get_formulae_dependencies(
+        formulae_installer = Upgrade.formulae_installer(
           formulae_to_install,
           flags:                      args.flags_only,
           dry_run:                    args.dry_run?,
@@ -237,7 +237,7 @@ module Homebrew
         )
 
         if args.ask?
-          dependants = Upgrade.get_dependants(
+          dependants = Upgrade.dependants(
             formulae_to_install,
             flags:                      args.flags_only,
             dry_run:                    args.dry_run?,
@@ -253,7 +253,7 @@ module Homebrew
             verbose:                    args.verbose?,
           )
 
-          formulae_dependencies = Install.get_hierarchy(formulae_installer, dependants)
+          formulae_dependencies = Install.collect_dependencies(formulae_installer, dependants)
           # Main block: if asking the user is enabled, show dependency and size information.
           Install.ask_formulae(formulae_dependencies, args: args)
 
@@ -264,7 +264,7 @@ module Homebrew
                                  verbose: args.verbose?)
 
         unless args.ask?
-          dependants = Upgrade.get_dependants(
+          dependants = Upgrade.dependants(
             formulae_to_install,
             flags:                      args.flags_only,
             dry_run:                    args.dry_run?,
@@ -280,7 +280,7 @@ module Homebrew
           )
         end
 
-        if dependants
+        if dependants.present?
           Upgrade.upgrade_dependents(
             dependants, formulae_to_install,
             flags:                      args.flags_only,
diff --git a/Library/Homebrew/install.rb b/Library/Homebrew/install.rb
index 2a2ecfb8ba..d1f23e77e7 100644
--- a/Library/Homebrew/install.rb
+++ b/Library/Homebrew/install.rb
@@ -232,7 +232,7 @@ module Homebrew
         false
       end
 
-      def get_formulae_dependencies(
+      def formulae_installer(
         formulae_to_install,
         installed_on_request: true,
         installed_as_dependency: false,
@@ -354,7 +354,7 @@ module Homebrew
         puts formula_names.join(" ")
       end
 
-      def get_hierarchy(formulae_installer, dependants)
+      def collect_dependencies(formulae_installer, dependants)
         formulae_dependencies = formulae_installer.flat_map do |f|
           [f.formula, f.compute_dependencies.flatten.filter do |c|
             c.is_a? Dependency
@@ -446,55 +446,6 @@ module Homebrew
         end
       end
 
-      # Build a unique list of formulae to size by including:
-      # 1. The original formulae to install.
-      # 2. Their outdated dependents (subject to pruning criteria).
-      # 3. Optionally, any installed formula that depends on one of these and is outdated.
-      def compute_sized_formulae(formulae, args:)
-        sized_formulae = formulae.flat_map do |formula|
-          # Always include the formula itself.
-          formula_list = [formula]
-
-          deps = args.build_from_source? ? formula.deps.build : formula.deps.required
-
-          outdated_dependents = deps.map(&:to_formula).reject(&:pinned?).select do |dep|
-            dep.installed_kegs.empty? || (dep.bottled? && dep.outdated?)
-          end
-          deps.map(&:to_formula).each do |f|
-            prune_build = f.recursive_dependencies do |_, dep|
-              :prune if dep.build?
-            end
-            # select the outdated one or not installed
-            outdated_dependents.concat(prune_build.map(&:to_formula).reject(&:pinned?).select do |dep|
-              dep.installed_kegs.empty? || (dep.bottled? && dep.outdated?)
-            end)
-          end
-          formula_list.concat(outdated_dependents)
-
-          formula_list
-        end
-        # Add any installed formula that depends on one of the sized formulae and is outdated.
-        unless Homebrew::EnvConfig.no_installed_dependents_check?
-          loop do
-            new_parents = Formula.installed.select do |installed_formula|
-              next unless installed_formula.bottled?
-              next unless installed_formula.outdated?
-
-              required_deps = installed_formula.deps.required.map(&:to_formula)
-              required_deps.intersect?(sized_formulae)
-            end
-
-            # Exclude anything already in sized_formulae
-            new_parents -= sized_formulae
-            break if new_parents.empty?
-
-            sized_formulae.concat(new_parents)
-          end
-        end
-
-        sized_formulae.uniq(&:to_s).compact
-      end
-
       # Compute the total sizes (download, installed, and net) for the given formulae.
       def compute_total_sizes(sized_formulae, debug: false)
         total_download_size  = 0
diff --git a/Library/Homebrew/reinstall.rb b/Library/Homebrew/reinstall.rb
index 75e29ea0ac..8fd5329dc9 100644
--- a/Library/Homebrew/reinstall.rb
+++ b/Library/Homebrew/reinstall.rb
@@ -7,8 +7,8 @@ require "messages"
 
 module Homebrew
   module Reinstall
-    Formula_keg = Struct.new(:formula_installer, :keg, :formula, :options)
-    def self.get_formula_to_reinstall(
+    FormulaKeg = Struct.new(:formula_installer, :keg, :formula, :options)
+    def self.formula_installer(
       formula,
       flags:,
       force_bottle: false,
@@ -62,7 +62,7 @@ module Homebrew
           verbose:,
         }.compact,
       )
-      Formula_keg.new(fi, keg, formula, options)
+      FormulaKeg.new(fi, keg, formula, options)
     end
 
     def self.reinstall_formula(
diff --git a/Library/Homebrew/upgrade.rb b/Library/Homebrew/upgrade.rb
index a52a58713b..a7826ca7a6 100644
--- a/Library/Homebrew/upgrade.rb
+++ b/Library/Homebrew/upgrade.rb
@@ -13,7 +13,7 @@ module Homebrew
   module Upgrade
     Dependents = Struct.new(:upgradeable, :pinned, :skipped)
 
-    def self.get_formulae_dependencies(
+    def self.formulae_installer(
       formulae_to_install,
       flags:,
       dry_run: false,
@@ -95,7 +95,7 @@ module Homebrew
         rescue CannotInstallFormulaError => e
           ofail e
         rescue UnsatisfiedRequirements, DownloadError => e
-          ofail "#{formula}: #{e}"
+          ofail "#{fi.formula.full_name}: #{e}"
         end
 
         upgrade_formula(fi, dry_run:, verbose:)
@@ -260,7 +260,7 @@ module Homebrew
       @puts_no_installed_dependents_check_disable_message_if_not_already = true
     end
 
-    def self.get_dependants(
+    def self.dependants(
       formulae,
       flags:,
       dry_run: false,
@@ -285,8 +285,11 @@ module Homebrew
         end
         return
       end
-
-      installed_formulae = ((dry_run || ask) ? formulae : FormulaInstaller.installed.to_a).dup
+      if dry_run || ask
+        installed_formulae = formulae.dup
+      else
+        installed_formulae = FormulaInstaller.installed.to_a.dup
+      end
       installed_formulae.reject! { |f| f.core_formula? && f.versioned_formula? }
       return if installed_formulae.empty?
 
@@ -369,7 +372,7 @@ module Homebrew
       end
 
       unless dry_run
-        formulae_dependencies = get_formulae_dependencies(
+        formulae_dependencies = formulae_installer(
           upgradeable,
           flags:,
           force_bottle:,
@@ -439,7 +442,7 @@ module Homebrew
       return if dry_run
 
       reinstallable_broken_dependents.each do |formula|
-        formula_installer = Reinstall.get_formula_to_reinstall(
+        formula_installer = Reinstall.formula_installer(
           formula,
           flags:,
           force_bottle:,