The reality is that those people just run Windows 10 (or even 7) until WELL after updates have stopped being pushed. There is a narrow window of people who care about updates who won’t upgrade (because EOL for Windows 10 is 2025), but they are very much the minority.
And of those who care about gaming? You are likely already running “ps4/x1” levels of hardware and we are going to be seeing the refresh SKUs late next year (probably). So it is even more likely that an upgrade will occur.
That said: Linux Mint is pretty much plug and play for most people. Hell, I reformatted my parents’ laptops to Linux Mint and they still think they are running Windows but I have fewer weekends of “Okay, time to do tech support until they start blaming their viruses on jewish space lizards” because they can’t break it. And with the ever bigger push for Steam Deck support, most games, once you enable proton (which is a checkbox), “just work”.