> That basically forces every app company to make sure their main domain at least has an AAAA record that goes somewhere They don't require that. They just req

> That basically forces every app company to make sure their main domain at least has an AAAA record that goes somewhere They don't require that. They just require that it works on an IPv6-only network with some kind of NAT64/DNS64-type gateway. I.e. they require that apps aren't manually using IPv4 addresses internally but either are using the OS APIs that protocol-agnostic, or doing the right thing manually.