I do bind mount data folders of the containers, I do backups, I have a notification system that alerts me if a container is not up, but a container can be up but have problems and, most importantly, I (and I guess a lot of other people) don’t always have time to solve problems. When I a few spare minutes a do a snapshot, I update the containers and if something goes wrong if I have time I troubleshoot it, otherwise I just roll back the snapshot and I’ll have a look at the problem when I’ll have time.