* NOC:
I see a great benefit here, you could default to IPv6 for everything and enable IPv4 only as fallback [...]
Preferring IPv6 over IPv4 is not even remotely the same as your original call to "lets drop all IPv4 only relays from consensus 2020 finally", as you wrote in message 08fee42f-f45d-a8c4-d4e6-c83c05b4fb08@afo-tm.org.
Dropping support for IPv4 nodes would be counterproductive and is not going to happen in the forseeable future, as was clarified here before by teor.
-Ralph