1) Speakers are inexplicably swapped between left and right and you have to debug alsa/pulseaudio/pipewire to find out why
2) Bluetooth and WiFi don't work without drivers that require downloading and installing packages manually from different versions of the OS (eg the Ubuntu 22.04 drivers don't work but 21.04 do and that's not documented anywhere, I figured it out by reading logs and googling)
3) some devices or drivers don't work without enabling new kernel modules
4) some devices or drivers don't work without building a driver from source, the official binaries are not usable on a given system
5) sleep doesn't work correctly without manual configuration on command line
6) /etc/default/keyboard must be manually modified with the correct keyboard configuration for the device; the UI can't do it
If you think the above are problems a layperson with no computing (and specifically Linux) expertise can solve, you may not be spending a lot of time around actual laypeople.