Not just IT people, everybody who uses this stuff.
What drives me insane is stuff that works perfectly gets broken with the next release. IOS 13 broke Apple Notes synchronization...I didn’t realize that until I updated a lot of my To-Do list on my iPad and it never synced to my iPhone or Mac. Then my updates all disappeared. Aaargh!
My iPhone 7 has battery issues after I installed the update. I know of one other person that experiences the same issue. My battery drains in less than a few hours compared to a day or more before I installed IOS 13.xx or whatever the first release was. The subsequent updates have not fixed any problems.