> I really don't understand this, how do you not make a transition plan the #1 requirement for selecting the next IP. To some extent, Postel's Law suggests the

> I really don't understand this, how do you not make a transition plan the #1 requirement for selecting the next IP. To some extent, Postel's Law suggests the only viable transition plan for the internet is "no transition plan"; expect both to continue to exist as long as they both need to and do your best not to break things or step on each other's toes. Relatedly, a slow "dual stack" IPv4 to IPv6 transition is as much validation for Postel's Law, and that is has been applied to a useful extreme, as anything else: traffic shifts as traffic needs to shift; the internet not only survives, it thrives; most users don't notice nor care.