read up on __slots__ 3. Data model — Python 3.10.2 documentation[^]

The last time I looked into it, it was because Visual Studio likes to run background services - you know, those notifiers that let you know "there's an update waiting". I got stuck in a loop once where the service actually got stuck, and was preventing the rest of an update from running and I got into a reboot-find-directory-delete-race, to try to erase the service before it auto-started. Took a couple of tries as I recall...