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What exactly does not work? What Distro were you using? Serious question because my experience is that I install Linux Mint and everything just works. Updates never break anything. Why should they? The only arguable pain point is maybe graphics drivers but honestly installing proprietary ones is just a few clicks these days. Plus you don't need them for office work anyway. (Maybe also some power saving features on ce…
I'm not the parent but I'll answer as a 9 years Linux user and advocate. Things just break with updates, or sometimes do not work. I'm on Ubuntu 20 right now and Firefox can't detect the microphone on some websites like FB or instagram, but works just fine on Chrome. On my home computer running Arch and similar setup Firefox detects the mic just fine. It's brittle, it feels like it's duct tapes all the way down and t…
Honestly at least relative to the general mood of the software industry I wouldn't say that foss projects don't care about backwards compatibility. The kernel is famous for caring a lot about it. The Debian project is quite known for being relatively conservative. Unfortunately Ubuntu is known for experimenting on its users but thank god nobody is forced to use that.