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.
A kind of “extended” 3-2-1, more a 4-3-2. As nearly everything I host runs on Docker, I usually pause the stack, .tar.bz everything and back that up on several devices (NAS, off-site machine, external HDD).
The neat thing about keeping every database in its own container is the resulting backup “package”, which can easily be restored as a whole without having to mess with db dumps, permissions, etc.