I voted never. Some former gfs did it many years ago with my computers because I have no patience for that. Ironically I do it up and there for other people (like my holy mother that I see just once in a year or so), because they think I am the guy working with computers, so I am an expert. People have computers in a state that complete reinstalls are necessary.
I buy a new simple laptop every year or two, because they do not last longer the harsh way I am treating them. Then I rather deinstall things than install. I need only browsers, Google Earth, VPN, HW wallet app and Telegram. Since I have new computers all the time, they do not need to be fixed by reinstalls.
I never touch servers.
If you talk to God, you are praying; If God talks to you, you have schizophrenia.