In another comment I ran iperf3 Laptop (wifi) —> Desktop (ethernet) which was about 80-90MBits/s. Whereas Desktop —> OtherDesktop was in the 900-950 MBits/s range. So I think I can say the networking is fine enough when it’s all ethernet. Is there some other kind of benchmarking to do?
Just posted a more detailed description of the desktops in this comment (4th paragraph). It’s not ideal but for now its what I have. I did actually take the time (gnome-disks benchmarking) to test different cables, ports, etc to find the best possible configuration. While there is an upper limit, if you are forced to use USB, this makes a big difference.
Other people suggested ZeroTier or VPNs generally. I don’t really understand the role this component would be playing? I have a LAN and I really only want local access. Why the VPN?
Ya, I have tried using syncthing for this before and it involves deleting stuff all the time then re-syncing it when you need it again. And you need to be careful not to accidentally delete while synced, which could destroy all files.
Resilio I used it a long time ago. Didn’t realize it was still around! IIRC it was somewhat based on bittorrent with the idea of peers providing data to one another.