What I mean by n-to-n sharing is that I have all of my devices sharing the same folder with every other device. This has definitely been a bit of a pain to set up and manage (moreso because a few machines use Docker so they’re basically double-NAT’d). My biggest concern is having conflicts out the wazoo and losing data. The most important thing to me is my KeePass vault.
That’s good. I don’t have a server, just syncing All my devices that need it (phone and 2 laptops) hopefully I never have an issue, but I will back up the database regularly just in case