Rubyists! tailwindcss-rails v3.0.0 is out, and it now relies on tailwindcss-ruby to package the tailwindcss executable.
https://github.com/rails/tailwindcss-rails/releases/tag/v3.0.0
This means you get to choose the version of tailwindcss that fits you best, even the new 4.0 alpha releases if you want!