Re: "Otherwise they'd probably all demand MacBooks"
Apps are no longer the king on the desktop: most people only use a browser anyway. Some diehards want a word processor that works offline, but for them LibreOffice is as good as "it's just like another version of Word".
I suspect people like that are already the majority, and they only use Windows because it comes bundled with new PCs. If their nerdy niece sets them up with Ubuntu, they're perfectly happy with it.
On the other hand, for them Windows, whatever version, is good enough, too. The only potentially relevant advantage of Linux would be better support for old hardware. That's not a big issue with Win10, but Win11 is another story. Somehow I suspect Win10 support will not end in 2025.