3 vpn segments:
1. foss, p2p-only, no server or intermediate nodes to trust (rayfish)
2. foss, brokered if necessary with all nodes self-hosted (openziti, nebula, some wireguard variants)
3. non-foss, mix of p2p and brokered, host some of the nodes yourself (openvpn, myriad of wireguard variants/wrappers like tailscale, headscale, netbird, netmaker)
why is #3 so much more popular?