Pika Backup for /home/ to an external drive. It's an automatic solution with a simple GUI that serves as a front end to Borg iirc. Lets you easily browse and mount old backups. Anything outside of my actual personal files can be recreated or restored trivially, so I don't care to back them up.
I also have a manual dump of /etc/ but i change it so infrequently that it doesn't really need looking after.
Nautilus in general is my biggest gripe with Gnome. I despise it so much that I'm willing to abandon ship to KDE when Plasma 6 reaches my distro.
I prefer public trackers and torrents just because I don't like gatekeeping piracy. I want those bits to be distributed as far and wide as possible. So anything I get and/or seed will be public.
Even if there are bad peers that don't give back (which there are many), plenty enough times it's just people with shitty under served Internet connections. I'm fortunate enough to have a good enough connection where that doesn't bother me.
Notepad in wine is pointless compared to something like gedit, which you have, or similar editors like geany or kwrite. Cinnamon might even have their own basic text editor. And then there are further options like mousepad from the xfce project or featherpad from the lxqt project.
Notepad in wine will just lead to frustration because of poorer integration.
Finally, I just saw your edit and I think you’re spot on. Not because of ARM, which is actually decently supported, but because running an OS off of a microSD card is slow and tedious. It just isn’t made for that quick, small random access.