Tailscale just keeps impressing. Love how simple their product is and how everything they touch just seems so well done.
Thank you. I live in two places; if Tailscale "just works" I could use it. I came to the comments figuring if there was actually a better product people would say so here.
ZeroTier and Nebula are the only modern alternatives I personally know about.
https://github.com/slackhq/nebula
Disclosure: I wrote and founded ZeroTier. Listed Nebula too for neutrality and completeness.