I don't think you can beat other languages yet, except in some very niche areas. There's not even incremental compilation!

Hell, even python can infer function types these days!

Rust has been around much longer than Swift for example, and yet there are many very more production Swift apps. Whereas rust seems limited to play stuff.

Of course, given another 2-5 years it should catch up in many ways. Comparing it to mature languages, or languages like Swift (from the worlds largest company paying some of the worlds best language developers) is not really fair.

Definitely a play ground for enthusiasts at this point. Which I guess is what you meant.