It's also quite hard to report fs issues. I ended up one day with a not working apfs system. Boot was ok, but I couldn't mount the user partition. Apfs repair tool just failed and made the system hang. After a number of restarts, attempts at repair, and attempts to move the partion somewhere it can be decrypted, everything started working. And I actually had enough experience to try and debug/fix it - many people would end up wiping the system, or having to go to Apple shop.

This is not reportable. I got only a generic error or hanging system. I can't reproduce it. I don't know why it started and why it finished. Yet, it was almost certainly an apfs issue.

Even if I wanted to play, my priority was to get the work laptop usable again.