iced really need better documentation. I try to get into it and have a hard time.

I wish Rust would adopt tokio (or any other, if better suited) as a default first citizen async runtime. Then everyone can be sure to write in that runtime , knowingly it will run. If people need a different runtime, they could still opt out of tokio and opt in to whatever they like. The freedom of choice would not be hindered, but we would gain a default runtime.

What’s stopping this from happening?

Do you mean compiler running on the Watch? Because the compiled code is no longer Rust and therefore there is no reason why it should not run on the Watch. Or do you mean specifically applications with the Rust library Egui?