That's a very simplistic statement. That's like saying IA-64 was over-engineered. It's completely unhelpful unless you can articulate in which ways it is over-e

That's a very simplistic statement. That's like saying IA-64 was over-engineered. It's completely unhelpful unless you can articulate in which ways it is over-engineered and propose a practical alternative. I take my hat off to the AMD folks that brought us x86_64. I challenge you to design a successor to IPv4 that is better than IPv6. Put it out there and let the world start taking shots at it. We'll see how well it holds up. There is plenty of opportunity for a better idea to catch on. Just like x86_64 succeeded despite the existence of IA-64. IPv6 has been so poorly adopted that it is not too late to retreat. But it would take a lot more than lazy criticism to find a workable path forward.