Nope, you don't need to, because of a simple fact that there is a very minuscule amount of IPv6-reliant systems in the wild. Most of them also operate in IPv4 (

Nope, you don't need to, because of a simple fact that there is a very minuscule amount of IPv6-reliant systems in the wild. Most of them also operate in IPv4 (because IPv4 is more prevalent). Name me an existing system where: a) requires IPv6; but b) not because of its long address. Good luck finding such a system.