I'd love to switch to helix from emacs - I really like the editing model when I have tried it. However I write a lot of clojure and the lack of a REPL in helix and reliance on using LSP for everything (which just isn't as good as repl integration) is a bit of a blocker. I hope their plugin system and embracing scheme for it means that some kind of REPL capability will be implemented and supported well. I hope that plugin branch is merged soon.

You might want to have a look at Matt Paras’s config. He’s been developping the plugin system using steel, his own scheme interpreter in rust. To send things to the repl, it uses eval-buffer from the helix-ext.scm file.

The integration and customizability is for sure not that of Emacs yet, but with the plugin system soon to be merged, we can hope to have a proper REPL and Parinfer implementation!

https://github.com/mattwparas/helix-config