I wrote Rails professionally for a few years back when that was THE de-facto tech for greenfield projects and new startups.
At the time, I really enjoyed it, but I'd never written a modern-feeling typed/gradually typed language yet (C#, which I found really verbose and ugly, a lot of pre-ES6 JS and Ruby, some Lua + Python).
I would never voluntarily write it again. Ruby/Rails completely falls apart in larger projects if the entire team doesn't stick to best practices + stringent code and doc standards with stuff like YARD or Sorbet. And so many magic, implicit methods injected everywhere.
Super happy writing Typescript and occasional Rust/Go now. I thought Kotlin was pretty nice too, the one small project I had to implement in it.
