I've been using #helix for several weeks now, migrated from #nvim and I'm not looking back. All the things I need and which are tedious to configure and maintain in nvim work just out of the box. You will still be missing some functionality that you know from CLion though, as far as I can judge from the outside. Proper rust-analyzer and (for me) clippy installation is a must though. Read and try the space popup functionality, it will help you a lot. Only https://github.com/helix-editor/helix/issues/1125 bugs me.