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all my wireguard tunnels could not connect upon upgrade. disabling the macos firewall allowed me to use my tunnels again, fyi.

I read somewhere about old ESET rules being in the macOS firewall blocked various udp traffic. Quick Google might get you more information.

Tailscale affected?

It is for me. I've had to disable it on my mbp and ios devices; otherwise DNS lookups choke.

Not for me.