You shouldn't because a filesystem snapshot should be equivalent to hard powering off the system. So any crash-safe program should be able to be backed up with

You shouldn't because a filesystem snapshot should be equivalent to hard powering off the system. So any crash-safe program should be able to be backed up with just filesystem snapshots. There will likely be some recovery process after restoring / rollback as it is effectively an unclean shutdown but this is unlikely to be much slower than regular backup restoration.