Why as their only OS? I assume many people connect their old PC to their TV and install a bunch of emulators. I suppose Linux could be an alternate solution for those machines.
The only reasons to keep Windows 7 are for niche SW/HW that only work on it and have no replacement, or because you want it out of principle. Neither of these are reasons to expect everyone else to bend over backwards to accommodate you.
Windows 7 drivers are compatible with windows 10 and 11 so there really isn't a reason you couldn't continue using basically any hardware after an upgrade.
I have netbooks which ran XP ok but W10 is a pain to run on them, or tablets with more modern Atom CPUs which ran W10 ok at the beginning but by the latest update they became close to unusable.