Running nicely. Wrote a simple little script to rsync over ssh and copy data back to my home server each night. Starts at 00:30 and runs for 8 hours using the "time limit" parameter on rsync. Had a couple of nights where it has stopped early when there's data left to copy, but I think that's probably the connection dropping out and it not continuing. Does the rest the next night so it's not a disaster.
One thing about the "time limit" option is that it needs to be supported at both ends. I wasn't aware that rsync needed rsync at both ends, hadn't really thought about how it worked tbh. So initially the rsync version on my home server was too old and didn't have the new time limit feature. Had to compile from source, but then that worked fine.
Copy 19GB of data in 8 hours across the Internet to my home server. This RPi4 setup lives at my girlfriends where I'm spending most of my time at the moment.