I am one of the maintainers of duplicity, a backup tool:
Duplicity is the command-line tool that sits underneath Deja Dup, which was granted classic confinement here:
Duplicity needs classic confinement for the same reasons: to read and write across the filesystem (for backup and restore).
The requirements are understood and I’ve vetted the publisher. Granting classic. This is now live.
@aaronw - fyi you can either request a manual review or upload a new revision and it should pass automated review.