XDG User dirs are cool, i agree. But that’s not really the problem here

Well, they aren’t even replying to whether the community-developed rclone backend breaks TOS, so don’t expect much… but yeah, i pay for Proton and they’re good for what they are.

Which isn’t a lot of time if we’re being honest

They’re very reliable from my experience

Just checked, you’re right about Google. Microsoft does allow you to use any app though. It’s funny that the “EEE” Microsoft is less anti-user than the “Don’t be evil” Google. But anyway, seeing how Google locks it down, I’m sure there must be others too. So you’re right

Which services aren’t supported?

It does have automatic Android cloud backups and does support local backups, which also supports backing up to Nextcloud.

The huge-looking sizes are not representative of actual size on disk. On first installation of one app of a kind, their runtime packages get installed as well. For example, installing GNOME apps will install the latest GNOME runtime. But after that, installing any other GNOME app takes little to no space.

In your case, you don’t seem to have any apps installed as Flatpaks, which means even the freedesktop runtimes are missing and need to be installed. That’s probably why it looks so huge.

Just use fish or setup autocompletions and suggestions on your terminal.