If you have a sufficiently large block of IPv4 addresses, I agree. There really isn't a major technical reason to adopt IPv6 at the moment.
However, my employer is moving to IPv6 for a different reason: IPv4 addresses have value. They've slowly been selling off large blocks of them for some tidy sums. Eventually, the goal is to have both IPv4 and IPv6 addresses on the front of our public facing load-balancers, but to otherwise use IPv6 for most everything else behind it.
Biting the hand that feeds IT
