I have two devices split by VNET and not routed out to the internet. I connect those two and a VPS to create a small Yggdrasil network. This allows me to access all three devices from “anywhere”. Would use again.
Good question. I could achieve the same with Tailscale or Innernet, both using Wireguard. So perhaps my answer has to be that Yggdrasil tickles my interest in mesh networking.