Re: Lies, damned lies, and statistics that don't lie.
According to the most recent figures, half of the IPV4 address values are not in use. Not attached to anything. Not responding to ping or in DNS because they aren't associated with anything.
Some of these IPV4 values could be 'easily' recovered. That is, for values of 'easily' which are much more difficult that implementing IPV6. As demonstrated by the fact that people who actually have to put money into it are adopting IPV6.