A big difference between Rust and other languages like Dart is that our async/await is based on the same sort of coroutine transform as generators would be, rat

A big difference between Rust and other languages like Dart is that our async/await is based on the same sort of coroutine transform as generators would be, rather than continuations, so its a lot less additional complexity to add generators compared to another language that has both async/await based on continuations and generators based on coroutines.