Just to add another anecdote...
Back in 2008 or so, my relatives did the really nice thing of buying my Grandma the cheapest possible Walmart computer they could find. You know the sort of Windows eMachine that comes preinstalled with spyware?
Of course, my relatives live about 6 hours away from her and all of the "on site support" fell to me. In the first 2 years of my Grandma getting this computer I must have gone over more than 10 times to fix all sorts of stupid issues that were pretty much inherent to the machine.
I grew sick of this and one day I went over, backed up the few important files on the machine and installed linux mint. That was in 2010, it is now 2019 and I have gone over to fix my Grandmas computer twice since. Once to help her set up a printer, and another time when she accidentally cleared her cookies and couldn't figure out how to log back into anything.
The strange thing is that my Grandma never commented on the Mint interface and as far as I can tell she never noticed that I completely changed the operating system ¯\_(ツ)_/¯