you can definitely back up apps and most files using adb and a computer, and probably even your phone itself by doing adb over the network back to your phone
also, i think there's a way of setting up a different location provider in the developper setings on android!
the desktop shell is mostly javascript though
i mean, you likely already could get some out-of-spec chinese chargers... that's Always been a risk when goong for low quality stuff!
it's that wayland wasn't ready, and now is ready. it took a long time, because building a new protocol like that takes a while if you want to do it well, and lots of coordination between many people. it still has issues, but they're being adressed. slowly, because x11 was full of half-assed solutions done quickly, and they don't want that to happen again
X11 being reliable because Xorg devs aren't stupid
xorg devs are wayland devs. nowadays, most of the people that used to work on xorg now work on wayland. they're not stupid, they realised that x11 is too dated for modern systems (see asahi linux) and now are working on a replacement
you could, but they definitely pushed you to use a single account everywhere, even logging you in automatically to your google account in chrome if you use it on google search or vice-versa