as someone who has written a lot of python but doesn't really work in the backend/services world, async itself felt like a huge mess to figure out when I was exposed to it while mucking around in FastAPI internals to prove out an idea. This was mainly because of the infectious nature of async and the fact that the callback function I was passing up had to be synchronous while also calling async functions while the entire thing was running in an async loop. That meant I had to add a dependency just to call a damn function https://pypi.org/project/nest-asyncio/.

Rant over. `for await` and `async for` to me seem like a fairly natural extension once you understand async. I think the problem comes in where once you run into async the first time you are forced to fully grasp it (and potentially rewrite a ton of your code) to move forward which is really counter to the rest of the Python learning experience.

[1] http://journal.stuffwithstuff.com/2015/02/01/what-color-is-y...