It would have been adopted a lot faster if they had just done this. Just extend the address space, make a small part of it the previous ipv4 address space so tr

It would have been adopted a lot faster if they had just done this. Just extend the address space, make a small part of it the previous ipv4 address space so translation between the two was trivial and it would have been easy to run them both side by side and transition appropriately with some translation services where IPv6 interfaced with IPv4.