Roughly understanding that there is a loop that is doing work on a queue and calling your code is useful insofar that you have a mental model for the IoC that i

Roughly understanding that there is a loop that is doing work on a queue and calling your code is useful insofar that you have a mental model for the IoC that is happening. I've seen smart and capable programmers who are not used to UI programming and async in general who struggle with callbacks and IoC initially. You can draw a simple picture on a whiteboard to explain the overall concept to give them something to grasp on.