I agree, and most other commenters still miss the point about what makes Rails so great :

it's not the technical part (you can point slowness, quirks in how the language/framework is used) but the human and business part. It works. It makes adapting to change easy. Yes it's a monolith, yes it encourages fat models, etc. But it works so damn well.

`rake db:migrate` is not so great as a feature (other frameworks in other languages have it), the greatness comes from how well it's integrated with the Rails workflow.