Comment 21 for bug 241305

While IPv6 only networks are quite uncommon still (though they do exist), not having services on IPv6 has implications for ISP networks going forward. As major ISP's are deploying Carrier Grade NAT, every IPv4 only service makes their CGN and/or NAT64 boxes ever bigger and more expensive to operate.

Postponing it much longer is not beeing a good netizen, yo ;-)