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 don't backup my personal files since they are all more or less contained in Proton Drive. I do run a handful of small databases, which i back up to ... telegram.
It's just a matter of time when Telegram will crack down on this and limit the amount of cloud Storage used. But until then, I'll happily use Telegram as a fourth backup