Removed windows 10 from my gaming machine for EndeavourOS, an arch based linux distro. Works wonderfully and runs all the games I care about with minimal tinker

Removed windows 10 from my gaming machine for EndeavourOS, an arch based linux distro. Works wonderfully and runs all the games I care about with minimal tinkering. I am now 100% windows-free on all my computers. More concerning though, is my grandpa, who is 89 years old, calling me kind of scared after seeing a classic Microsoft threat like "Upgrade now or else". I don't know what to do. I could probably upgrade his computer to 11 but I really don't want him to have to relearn everything he knows about his computer. Maybe just ignore it for as long as we can?