Snapshots are great for solving accidental oopses, and for getting consistent backups that reflect a single point in time. But they aren’t backups. If the HDD or SSD dies snapshots don’t help. If the file system gets corrupted snapshots don’t help. If the file data becomes corrupt snapshots don’t help (since they only store a single copy of any version of a file).

So snapshots are no substitute for backups. I run btrfs and I do backups, and I sync those backups to a remote location (look up 3-2-1 backup).