Witcher 3 is the best game I've played in recent memory and probably the best RPG I've *ever* played (as a gamer of 30+ years) and it's not on the support list ;/ Waiting for Blood and Wine with my season pass.
I'll stay on Windows 7 as long as I can as a gamer but I will under no circumstances "upgrade" to 10 and I actively steer people away from it. The sad thing is there are really no commercial alternatives that they can just go buy something. No one wants to learn how to install Linux - even something "easy".
Apple is just as bad or worse than Microsoft, Google is the lesser of the major evils but getting progressively worse as time goes by. I think there are probably some family members I could put on Mint or something but the second they try to go like install a little kids game for Windows and it doesn't work they'll raise hell and doing free support sucks, while they periodically fuck up their Windows machines they at least have some (very) modest ability to use it.
I can't say "just get an X that runs Y" because for my g/f's parents or whoever it doesn't exist that supports their existing program and no one likes changes - especially "senior citizens".