We'll never completely run out of IPv4 addresses. Meanwhile the top agencies distributing IPv4 blocks have ran out of them a decade ago. Recently it was the

We'll never completely run out of IPv4 addresses. Meanwhile the top agencies distributing IPv4 blocks have ran out of them a decade ago. Recently it was the time for a lower level agency to run out - for Europe. There's a lot of things that people don't care about until it's too late. Governments are supposed to be able to plan decades in advance. And they do, for things like digital TV. (And I already gave an example of governments acting to push IPv6.) CGNAT is causing issues in that some protocols simply don't work properly through them. IPv6 also allows for simpler networking, since you don't have to add the extra abstraction layer that is NAT.