It appears to me that setting up #Syncthing grows quickly more cumbersome, the more machines there are in the cluster. I guess at some point, it makes more sense to have a homeserver instead.
Discussion
nostr:npub1wx0tnmv8stshjztht58wapgpsha9smtuqcsrkq3up4t0a9e7dazqljce0l I usually have one marked as an "introducer" and the other devices sharing a folder get added.