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.
We are all bloodsucking ticks, hungry, devious
each one latched on to the ass of the previous
when the last and the first latch on it can be shown
ass-blood sucked by the first from the last is his own