Flatpak experts? Or at least knowledgable users...

[oshunluvr]

I ran into this on a btrfs subreddit:

is it good practice to create a subvolume for /var/lib/flatpak?
I mean, are flatpaks completely "independent" from the rest of the system?
so if I restore a previous btrfs snapshot with old kernel and libraries, do flatpaks still work with this layout?

I don't know enough about flatpaks to answer, but if Flatpaks are completely distro agnostic and quickly re-installed, is there any reason to back them up? I can see a use-case where one would use a separate subvolume as suggested above to reduce overall snapshot/backup size of the main subvolume.

Furthermore, could one mount the same flatpak subvolume in multiple install (in the case of dual booting) and would that work? I assume you would have to somehow create the menu entries in the other distros.

I have questions, people...

[Snowhog]

TL;DNR (for me): https://docs.flatpak.org/en/latest/dependencies.html

[claydoh]

I don't see why this wouldn't work for sharing between distros, though I imagine the actual system libs for flatpak probably want to be identical.

Don't forget that flatpak can be installed to the user's home dir as well, would a shared $HOME , or a sub volume mounted to ~/.var preserve all the shortcuts, etc?
Logic, or what passes for it in my head seems to indicate it would.

I haven't found a reference to when or how flatpaks or the DE generate menu entries