Rust is nicer for async and MT than c++ in every way. I am pretty sure.

But it's still mid. If you use Rust async aggressively you will struggle with the borrow checker and the architecture results of channel hell.

If you follow the "one control thread that does everything and never blocks" you can get far, but the language does not give you much help in doing that style neatly.

I have never used Go. I love a lot of Go projects like Forgejo and SyncThing. Maybe Go solved async. Rust did not. C++ did not even add good tagged unions yet.

Not sure where this is coming from.

Async rust is amazing as long as you only mix in one more hard concept. Be it traits, generics or whatever. You can confidently write and refactor heavily multithreaded code without being deathly afraid of race conditions etc. and it is extremely empowering.

The problem comes when trying to write async generic traits in a multithreaded environment.

Then just throwing stuff at the wall and hoping something sticks will quickly lead you into despair.