WireGuard has really made it extremely easy to join my home networks on both sides of the Atlantic, and my cloud services (private side) together. Syncthing is replicating (note: do not confuse this for backing up - not the same thing) important data between two of my machines, while Borg is maintaining backups in multiple locations. All running smoothly between Qubes VMs, cloud VMs, Fedora and Debian on metal, and even the two iOS devices I still use.