There's definitely a missing part of this which talks about when to use this sort of approach. The answer is often when there's non trivial amounts of stuff tha

There's definitely a missing part of this which talks about when to use this sort of approach. The answer is often when there's non trivial amounts of stuff that happens between the end of one method and the start of the next which is in control of the external system. That said, I often argue that async/await solves the majority of that problem by implicit modeling of the state machine while keeping the code readable.