TextAdept has been around for ages. It's a great lightweight editor.

However, it is missing a lot of features I've grown used to in (arguably more baroque) editors like Emacs, Helix and VS Code. Mostly stuff that builds on LSP.

When I last tried it (admittedly almost two years ago), it didn't have Rust syntax support at all and I couldn't get LSP (which has a plugin module made by the main developer at https://github.com/orbitalquark/textadept-lsp) to work at all.

I'd be interested to hear if anyone tried it more recently and has had a better experience.