@neil i love not waiting ages for Steam/PS5 downloads and patches. Also container images when I'm working during the day. The 100Mbit up is great for backups, they actually complete during the night now.
@TheZeldaZone Syncthing is worth checking out. You can run it entirely locally. It might take a minute to work out, but once it's going it's good. https://syncthing.net/