In reply to launchpad bug #1575053, Mark Shuttleworth supported moving snap user data from “$HOME/snap” to “$HOME/.snap” (see comments #11 and #13). Is this move still being planned?
If some snaps need access to a visible folder, couldn’t snaps be given access to something like “$HOME/Snap” (upper case “S”) for data that is expected to be user accessible, while placing all data that is not expected to be user accessible in “$HOME/.snap” (hidden), which would better comply with the XDG spec?