Ruby on Rails 8.0 introduces Kamal 2 for easy deployment, Thruster for enhanced server performance, Propshaft as the default asset pipeline, a complete authentication system generator, and SQLite support with new adapters, replacing MySQL/PostgreSQL.
https://alternativeto.net/news/2024/11/web-application-framework-ruby-on-rails-has-released-version-8-0-with-many-improvements/