- the built in bluetooth and wifi can't be used at the same time; for a while we mitigated this with a USB wifi module, but that eventually broke and so now bluetooth is just disabled.
- it's hard to figure out what apps and app data are shared between users. AFAICT there's one Steam install my kids are sharing, but each one installs their own copy of a game, which is terrible for disk usage.
- a bunch of games don't work, especially from non-steam sources like Epic and Itch.io. I've heard about the Heroic Launcher, and I will try it at some point, but it's just... one more fiddly thing to have to mess with.
- several Minecraft launchers / mod-managers have been tried, but I can't seem to keep my Microsoft account logged in on there, so I eventually just put my password on a sticky note so they could re-auth it whenever needed (fortunately I don't use it for anything else).
- unattended-upgrades pulled a new kernel and the thing just panicked on startup until I went into the grub menu to get the previous one and reverted.
- until 25.04 the power management story was terrible, the machine would chew through the whole (newly replaced) battery in less than an hour.
As a competent nerd I've been ~fine with all this, but it's honestly right on the edge of acceptable. I expect a normal person would immediately give up in the face of most of these— either give up in terms of ditching the machine/OS or give up as in accepting a limitation like it just doesn't play that game or I just can't use my earbuds.