Businesses that switch to IPv6 are still dual-stack, so they can't give up IPv4 addresses. Basically IPv6 has NO ADVANTAGES until everyone converts. Which will never happen. So anybody who implements IPv6 is wasting time and money. What we need is IPv7. Admit that IPv6 was a failure and do it right (i.e. as an extension to IPv4 that gradually sucks the life out of its host). IPv6's independence from IPv4 was its fatal flaw.