in 100 years ipv4 will be recognized as one of the great discoveries like calculus. ipv6 is a misnomer really. It's a separate, and lesser protocol. Much like other second systems, it was too ambitious and not pragmatic enough.

Rather than looking down on IPv4 , we should admire how incredible it's design was. Its elegance and intuitiveness, resourcefulness have all led to it outlasting every prediction of it's demise.