IPv6 just turned 30 and still hasn’t taken over the world, but don't call it a failure

The world has passed it by in many ways, yet it remains relevant
Feature In the early 1990s, internetworking wonks realized the world was not many years away from running out of Internet Protocol version 4 (IPv4) addresses, the numbers needed to identify any device connected to the public internet. Noting booming interest in the internet, the internet community went looking for ways to avoid an IP address shortage that many feared would harm technology adoption and therefore the global economy.…