That said, I keep ~/Documents and ~/dev these days in Syncthing directories, and one of my syncthing nodes is an Ubuntu LTS server with zfs, with the zfs-auto-snapshot package installed.
I still run my old backup system periodically (once or twice a month) but I now think Syncthing is at a point of reliability where realtime cross-machine sync is now my primary safety net wrt "the machine in front of me has turned to entropy", versus some point-in-time backup.