>IPv6 is now older than IPv4 was at the time IPv6 was invented. The quantity of existing deployments that need to change is much larger for v6 than it was for

>IPv6 is now older than IPv4 was at the time IPv6 was invented. The quantity of existing deployments that need to change is much larger for v6 than it was for v4. The problem with deploying v6 isn't that it's too different from v4, the problem is that it's different at all. Your v7 will have the same problems.