I use Emacs professionally for Ruby development and LSP (Solargraph) is a huge part of what makes it work smoothly. I also do a lot of hobby Flutter/Dart devel

I use Emacs professionally for Ruby development and LSP (Solargraph) is a huge part of what makes it work smoothly. I also do a lot of hobby Flutter/Dart development and the same is true there. Languages that I’ve tried to work with this way but failed include Java, Kotlin, Swift, and C#. But I could see any of them working great if the LSP implementation was robust enough.