I had a mac at work for 8 years. Overall things mostly worked ok, but I had two big issues.

a) one time charging stopped working... thankfully I had a pretty full charge when I noticed and was able to migrate my data to a spare machine and not have to deal with it... removable storage would have been super handy.

b) for a whole year, there was about a 25% chance of loud static instead of music when I started playing a stream in iTunes; pause and play again would fix it most of the time. It started when I installed a named OS revision, and it stopped when I installed the next version. Did not have issues with sounds from other apps. Of course, there was no information to be found anywhere about this, because 'macs just work'

Less big, but if Outlook was running when I put the laptop to sleep, there was a good chance it would continue to eat battery and generate heat in my bag. Outlook is a travesty, but when the corp runs Exchange, Outlook is less effort to make work compared to fighting to make auth work with anything else and then still having to use Outlook from time to time.