I'm in the same spot. I still use & love Rails, but having adopted TypeScript & VS Code (w/ React) for the front-end, I find myself missing those luxuries when I switch back to Ruby/Rails/Vim.

I'm leaning towards a full TypeScript stack for my next project. The idea of sharing types & code between client & server is incredibly seductive. But there's no Rails for TS/Node, so I know it's going to be a shit show assembling all of my chosen libraries into a cohesive whole.

Although looking at your previous comment, perhaps I should give Kotlin / Ktor a try?