> There’s two prototypes we’re exploring that could potentially exist side by side: a typed list/ML-like implementation for scripting and a Rust based interface for things that require performance. Could potentially run both in wasm but I’m personally a bit unhappy with how big wasm implementations are, easily several orders of magnitude compared to the editor
https://github.com/helix-editor/helix/wiki/FAQ#how-to-write-...
So they're not avoiding making it extensible on purpose, seems they haven't found the right way to do it yet.
