I also want to point out that Manuel Schoelling been working on and released a p2p [1] distributed hash table [2] work on top of WireGuard to build a VPN mesh. He talked about this recently [3] at FOSSEM.

[1] https://github.com/manuels/wireguard-p2p [2] https://github.com/manuels/bulletinboard-dht [3] https://www.youtube.com/watch?v=0Z8Lougf9Vk