I was trying out ZeroTier a few years back and found it fantastic. I was, at the time, working for a large security network device provider and trying to get R&D to bake it into the flagship product - this was before SD-WAN really took off. I never got anywhere with that agenda, but - still think that would have been a fantastic use case.

I'm curious if the stalwarts of the network security space, with their old and crusty VPN concentrators, finally move on WireGuard. Likely not until enough customers move away from them to a solution using, or they get around to finally running a recent kernel.