This feels analogous to the problems w/ futures in Scala/Java as they were first introduced. And the solutions are provided by libraries like https://monix.io/

This feels analogous to the problems w/ futures in Scala/Java as they were first introduced. And the solutions are provided by libraries like https://monix.io/ https://monix.io/. So why are promises the problem instead of the lack of libraries on top of them? I understand cancellation cannot be fixed, but laziness sure can. As for synchronous execution, that's just not gonna happen in event-driven-land. It doesn't with other callback-based APIs (except AJAX which is deprecated) and I don't see the complaints there.