I recently began having major problems with emacs, including my emacs freezing for significant amounts of time and my exwm windows requiring a repeated command to share focus: one for emacs to think it was focusing there, and another for exwm to move its focus. It never occurred to me that they were related, and efforts to sort them out went to a recent juncture in which I’d both performed a rolling-system upgrade (3000+ packages and Linux kernel upgraded) and also some major upgrades to my emacs config.

The pains of working with abstract systems are little understood by outsiders. Like my toddler. Credit: https://www.improgrammer.net/shouldnt-interrupt-programmer/