TailScale sells certificate escrow, painless SSO, high-quality integrations/co-sell with e.g. Mullvad, full-take netlogging, and "Enterprise Look and Feel" wrapped around the real technology. You can run WireGuard yourself, and sometimes I do, but certificate management is tricky to get right, the rest is a pain in the ass, and TailScale is cheap. The hackers behind it (bfitz et all) are world-class, and you can get it past most "Enterprise" gatekeeping.

It doesn't solve problems on my personal infrastructure that I couldnt solve myself, but it solves my work problem of getting real networking accepted by a diverse audience with competing priorities. And its like 20 bucks a seat with all the trimmings. Idk, maybe its 50, I don't really check because its the cheapest thing on my list of cloud stuff by an order of magnitude or so.

Its getting more enterprise and less hackerish with time, big surprise, and I'm glad there's younger stuff in the pipe like TFA to keep it honest, but of all the necessary evils in The Cloud? I feel rather fondly towards tailscale rather than with cold rage like most everything else on the Mercury card.