Async/await is a _concurrency_ mechanism, and concurrency is certainly naturally useful. However async/await is certainly not the best implementation of concurrency, except in the narrow design space Rust has chosen. If you have a language with a runtime, green threads/fibers/coroutines, along with a choice mechanism is really the way to go. It trades off some performance for much better ergonomics. Go, Java, Racket all use this. It is unfortunate that Python picked async/await.