I don't miss it one bit. Yes, you can build things quickly, "rails g scaffold" was quite a tool.
But the level of discipline required to keep a large Rails codebase from turning into spaghetti is not to be underestimated. Plus, because of Ruby's flexibility, a bunch of functionality is sort of "magic pudding" and happens via extension and meta-method sort of things.
This makes things like Ctrl+Click being the source of truth and being able to generate some sort of ERD-diagram in your IDE of everything that touches another thing difficult to implement.
I also don't miss dynamic types in the slightest.
Nowadays, I would rather look at Laravel with Livewire and Alpine.js if you want something Rails-esque. PHP is godawful though.