I like Tailscale, but it's difficult to argue with a straight face that it's not seriously suffered from product creep.

This is the inherent problem with tech start-ups. Once they solve the problem they were founded to solve, then what? It's feature complete, but investors insist that the line must go up. Can you imagine if `sed` or `vim` was brought to market by a venture-backed company?

IMHO, capitalism and FOSS are fundamentally incompatible.