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This little Tailscale outage is a good example of the kinds of issues caused by running dual stack IPv4 and IPv6 setups. Everything has to work twice. It’s *not* a reason to not support IPv6 but it is reason to not undersell the additional complexity it can cause.

About the Tailscale.com outage on March 7, 2024tailscale.com On March 7, 2024, tailscale.com was unavailable for approximately 90 minutes due to an expired TLS certificate. We were able to identify and address the issue quickly, and the downtime was mostly limi...

I think that's right. People both generally oversell the difficulties of IPv6, and undersell the difficulties of doing everything twice.