I know it's been talked about many times, but I think the reason we don't see an obvious Rails-like framework take off in JS is because Rails derives a lot of it's magic from Ruby. It's a lot harder to capture the same ease of development in JS/TS. NextJS is maybe the closest, and even then, it left a lot of the proverbial batteries un-included.

Metaprogramming is a sharp knife that's easy to stab yourself with of course, but damn, I miss working on Rails apps daily.