alt Hacker NewsThe answer is something like:
https://www.ietf.org/archive/id/draft-thain-ipv8-00.html#sec...
They key things is that pretending interoperability with IPv4 can be an after thought or dual stack is a good idea was just stupid and proven to be so. Flag day or IPv4 fading into oblivion never going to happen.
I know 50% is slow because that is LESS than new deployments over the past 3 days, so if someone thing “better” can be deployed to new projects until all old projects migrate is broken.
I've seen that draft. It's not backwards compatible in any ways that v6 isn't.
The people designing v6 knew from the start that interoperability with v4 was a requirement. It's written right into the list of requirements for v6[1], right in the same place that they say that a flag day is never going to happen.
Why do you believe otherwise? The RFC is right there for anybody, including you, to read.
[1] https://datatracker.ietf.org/doc/html/rfc1726#section-5.5