Required message that “raid is not a backup [solution]”, it’s an uptime and recovery system.

My primary server uses raid along with snapshots, full local backups, and off-site backups for critical data to two different cloud providers on different continents.

My second server backups images to the primary. My vps also backups to the primary. Both get the raid and snapshot treatment, and local, but not cloud. Gaming servers, boinc, and home assistant aren’t ‘critical’ :p