How I upgraded my pet project from Rails 7 to Rails 8 in 30 minutes

Rails 8 upgrade process for a custom project layout is outlined. Key steps include updating the Gemfile, reinstalling gems, and running rails new to update project files. Customizations are reintroduced by modifying 11 specific files. The approach uses separate custom files loaded into generated files, minimizing changes to default files. This method simplifies future upgrades by allowing easy overwriting of default files and adding a few require statements. The process was successfully tested on a prototype project with authentication.