ts is superset of js, so I wouldn't say you avoid it. It's like saying you run to avoid walking.

On the web, I get that CSS is not straightforward, and HTML is not the coolest technology, but by using the canvas you also lose a lot stuff that you need to rebuild from scratch: accessibility and interactivity, responsiveness, etc. So the only argument that I'd buy is that it has lighter & more performant UIs, which I get it might, given that the canvas uses the GPU, but is it worth the effort? Like, is it THAT much better?

I get the argument of native apps though. I guess if you want to build one interface and serve it both as a web and native app, it could make sense.

Edit: thanks for the link - I'll look it up. Also I didn't mean to sound too annoying. I'm starting to see UIs built in Rust but I'm still struggling to see the hype.