We need people like nathansobo to try out new ideas and directions. I, personally, am very much looking forward to their WebAssembly-based extension system and Zed being the flagship UI application developed in Rust.
Eg: Speed? Different UI layout? Fundamentally different design/UX philosophy?
Despite VSCode being an Electron app, I've never had any performance issues with it - really, it's a great example of how Electron can be done right.
On collaboration, I'm not sure what they might add that isn't already covered by GitHub/GitLab/AzDo etc. Again being honest, "collaboration" sounds like a weak Open Source pitch to VCs. I'd be interested in some details though, incase there is something truly novel here.
The biggest performance improvement would probably be RAM usage. You don't notice laptop specs get more RAM. The usual options are still 8GB or 16GB. Until 32GB / 64GB is the new default, having a non-electron app will always be an improvement.
Personally I don't think it matters that much in the end, whether it is CPU usage or RAM, but if the editor was just as capable but faster, I'd switch. Code will never be rewritten from scratch and it will always be tied to Electron, starting a new text editor built with faster technologies could give a long-term edge the existing competitors would not be able to use.
Secondly when you re-create from scratch you can keep the best features and drop the ones we've learned are not so useful.
Godspeed!
VS code is written almost 100% in JS and typescript, it will always be a nodejs app through and through without a complete rewrite. And even if they wanted to rearchitect VS code all of the extension APIs, extensions themselves, etc. would demand the existing nodejs runtime.
So long story short... VS code is a good editor if you want to contribute to a nodejs and web tech based text editor, but not if you want to explore other architectures or ideas.
there is quickjs and some others, some of them are rust-based and all of them can run in wasm host
EDIT: to be honest, I clearly see where you are going with this and I agree :)
For Julia, Atom+Juno was excellent. It was the first time I could select+run on a proper IDE (I was coming from python+notebook). To me this was revolutionary. Then I discovered VS Code, so Atom+Juno stopped making sense. You seem to be a very competent developer, so why not just contribute to VS Code?