Hard disagree. Co-routines are utter hell. They should have never become popular.

With traditional locking, the locked segment is usually very clear. It's possible to use race detectors to verify that objects are accessed with consistent locking. The yield points are also clear.

With async stuff, ANY await point can change ANY state. And await points are common, even sometimes for things like logging. There are also no tools to verify the consistent "locking".

So I often spend hours staring blankly at logs, trying to reconstruct a possible sequence of callbacks that could have led to a bug. E.g.: https://github.com/expo/expo/issues/39428