I only just found out about borg and restic, but the sites I looked at both mention "backup" prominently. And that makes sense. If I ever sign up for rsync.ne

I only just found out about borg and restic, but the sites I looked at both mention "backup" prominently. And that makes sense. If I ever sign up for rsync.net, it will be so I can store long term backups of my stuff, which I might add to incrementally, but never really change. But Unison is for syncing, which means maintaining eventually consistent replicas of a changing directory tree (up to some pragmatic exceptions and manual tweaks). The whole point of Unison is to turn multiple devices into a single failure domain, which requires a separate system for storing safe backups.