It's true that the effort to implement IPv4+1 or IPv4+2 would be of a similar order to implementing IPv6. But the problem with IPv6 isn't how long it takes to write the code for it. It's the fact that no-one wants to use it.
Maybe someone could write up an RFC for IPv4+2 and we all just start implementing it in our open source projects, and see how long it takes to overtake IPv6.
Biting the hand that feeds IT
