They do occur but they're rare. I remember the move from sysvinit to systemd taking about 10 minutes, and I have a 3 year old Arch install that has never outrig

They do occur but they're rare. I remember the move from sysvinit to systemd taking about 10 minutes, and I have a 3 year old Arch install that has never outright broken on me after an update. Frankly I remember going through more pain every 6 months from in early Ubuntu days (although that's a lot better now also).