A couple of months ago I switched from Neovim with a carefully crafted config file to Helix with zero config. I haven't looked back.

As far a performance, well, Helix + Alacritty is the fastest thing I know of. Snappy AF. You're still at the mercy of whatever language server might be grinding away, but at least it doesn't block the UI in any way. Every other component (tree-sitter, ropey) is performance optimized by Rust nerds who love that sort of thing.

Helix is awesome. But the plugin system is not there yet, so it is limited to its core features. There are no extensions so you only get a very good modal editor with very well made core features based on its LSP and Treesitter integration.

The only reason I don't want to make the switch is the missing (but WIP) support for multi LSP which is essential for frontend stuff (e.g. tailwind with React or just basic JSX support compared to VS Code). Snippets are WIP as well, but I could live with a workaround like pasting them from somewhere else.

Zed! That's a blast from the distant past! I enjoyed this 1980 paper about its development: https://onlinelibrary.wiley.com/doi/abs/10.1002/spe.43801001...

EDIT: I just saw in my own comment history that I knew (but forgot) there is a more recent Zed text editor which is probably the one you meant.