Physically-separate location or not snapshots that can be added, updated, culled, or deleted by local systems aren't backups, they're replication. Replication replicates problems.

Vaulted offsite on at-rest storage media is the only valid way to store backups. Every other "convenient" "backup" service or snapshot replication process is a liability businesses must avoid. Lose all your data, 50%+ you're out of business, and The End.