After reading

https://hypermedia.systems/

I came to the conclusion that the best frontend is no frontend.

Don't be afraid, it's great! I certainly wouldn't call it "obscure", I've been using it for 10 years now to compile a complex app into highly-optimized client-side code. And the community is very welcoming and mature.

https://www.scala-js.org/ is quite phenomenal.

You should try Gleam. I'm using it in production to great delight:

https://blisswriter.app/

https://blog.nestful.app/p/how-we-dropped-vue-for-gleam-and