No? The fact that some machines (notably: all your _own devices_) need to be able to reliably talk to each other does nothing to impact anonymity on the Interne

No? The fact that some machines (notably: all your _own devices_) need to be able to reliably talk to each other does nothing to impact anonymity on the Internet. Sure, you can route everything out of your own IP using Tailscale also, and that might be desirable if you're on a crappy connection, but it's still completely orthogonal to privacy-preserving techniques like Tor (and may in fact make those easier to deploy). Tailscale doesn't make privacy worse any more than the fact that to a first approximation, no residential Internet provider in the US has rotated an IP in recent memory. (Disclosure: I'm a (small) investor via Latacora's sibling fund, Lagomorphic.)