But that's in a world where IPv4 doesn't exist. But it does, so I see an increased number of available IP addresses that many people can't access, so you must k

But that's in a world where IPv4 doesn't exist. But it does, so I see an increased number of available IP addresses that many people can't access, so you must keep an IPv4 stack which makes everything more complex and more expensive. I understand the support of new technologies but IPv6 is 27 years old.