MJ, I installed Linux on a PC here a few years ago. It took me days to get it working properly - after which, yes, it was impressive. I had to learn a whole load of batch file processing stuff that took me back to Windows 3.1 and the late 80s.
Then the graphics card died and was replaced with a different model: it refused to have anything to do with anything. I had to install Windows to get the thing working again.
I'm not going there again, nohow. Not even for a dozen or so lovely people who aren't into computers. I could see several weeks of my life trying to sort a batch of different machines with a load of historical and treasured stuff on them. If anything gets lost, it's my fault.
If they do something silly with their XP installations, it's not my fault: I'm the chap who turns up and fixes it for nothing more than a cup of coffee. An afternoon a year isn't too bad.