I am a FOSS enthusiast, and use FOSS whenever possible. However, my DAW of choice is Reaper. It may not be FOSS, but I love this application. It works well, on windows, on Linux. It’s powerful.

The downside is that if a device you aren’t online with modifies it, and doesn’t reconnect to the internet or even LAN that the other client is on, other clients will be out of date and potentially cause file syncing/overwriting issues.

But SyncThing is a good tool for this.