See the reply to parent. For a hobby project I think it's an interesting experience to try. Especially if you also intend to write a back-end in Rust. But for production use, and productivity in general, I don't think it's close to ready.

I find Rescript to be much more enjoyable for both hobby and production use. If you're looking for a front-end language that is quite similar to Rust, just without the manual memory management :)