The best examples would just be the implementations of yield/async/await in C#, Javascript, Kotlin, Rust, etc. The only novel thing I'm proposing here is a shif

The best examples would just be the implementations of yield/async/await in C#, Javascript, Kotlin, Rust, etc. The only novel thing I'm proposing here is a shift in the syntax from explicit suspension points and implicit initiation of async operations, to implict suspension points and explicit initiation of async operations. Kotlin (which I mentioned) already mostly does this.