Re: Facebook not running IPv4 at all?
V6 is so complicated that my entire home network automatically configured when they activated it on my connection. It was so seamless it took me a while to notice.
The extra address space may be the driving force behind deployment, but it's not the only advantage. Built in multicast has the potential to reduce streaming bandwidth considerably. Imagine being able to stream video directly to a million people from a home internet connection. With ipv6 this is possible.