Most things should work just fine. There’s not all that much that requires x86.

So the real question is, what does your mom need/want? NextCloud? Jellyfin media server? Ente photos?

Maybe just a media center? Basically an Apple TV on crack?

Well crud. Thanks for the heads-up. First I’ve heard.

Sounds like Quad9 doesn’t actually do ad blocking, so that’s not much of a replacement.

It’s free for a limited number of queries per month. Generally enough for one device (depending on personal usage, obviously). Edit: It’ll still function as DNS after that limit, you just won’t get ad blocking and whatnot.

Mullvad has a free ad-blocking DNS you can use, too. I recommend the “base” version: https://mullvad.net/en/help/dns-over-https-and-dns-over-tls