It’s a combination of learning new languages and concepts, expanding my skill set and so on. I have written typescript professionally for a number of years now, and its type system doesn’t even come close to Rust.

I use Go professionally and would most likely choose that if I had to do any new “serious” web dev project. But the Rust eco system has come a long way. Plus, the borrow checker aren’t really that tedious once you get use to it. At that point you get a lot of benefits!