I see many posts asking about what other lemmings are hosting, but I’m curious about your backups.
I’m using duplicity myself, but I’m considering switching to borgbackup when 2.0 is stable. I’ve had some problems with duplicity. Mainly the initial sync took incredibly long and once a few directories got corrupted (could not get decrypted by gpg anymore).
I run a daily incremental backup and send the encrypted diffs to a cloud storage box. I also use SyncThing to share some files between my phone and other devices, so those get picked up by duplicity on those devices.
I use RSnapshot and make incremental backups to an external harddrive, and (I know it’s not a backup) run my two RAIDs (one for media, one for general data) in mirrored mode.
When I eventually upgrade my home server, I will upgrade from 2x2 2TB drives in RAID1 to four 8TB drives in either RAID5 or 6 - I am still undecided if I am willing to sacrifice 4TB of capacity to the redundancy gods and get an extra harddrive that can fail without data loss in return.