Apparently, only the vast number of new addresses allowed by IPv6 could save us. Since then, we've been waiting for IPv6 to come into use. And to this day, almost no one uses it.
Most networks have a single point of contact to the Internet.
By so doing, and completely by accident, these companies saved the Internet. This left IPv6 out of a job. The problem is, everyone can live without it. And the first people to use IPv6 won't get any real benefits at all. Put it on your routers, and it only affects traffic within that domain.