For better or worse, Microsoft is all in on the JS ecosystem. I could sooner see TypeScript being rewritten in Rust: at least from a performance perspective, there’s a lot more room to improve there. But I think it’s safe to say that’s not gonna happen.

VSCode is much larger, and much more complex. I just can’t imagine it happening ever.

No I can't see it happening either. But why spend a lot of time reinventing a wheel when everything about VSCode is actually pretty good, except its performance. But I'm a Vim user anyways so what do I care...