It isn't hard to do some arithmetic and guess that if every household in the world had IPv6 connectivity from a relatively low-density service like the above example, we would still only burn through about 3% of the IPv6 address space on end-users (nothing said about server farms, etc. here) but what does bother me is that the typical end-user today has one, single IP address; and now we will be issuing them 2^16 subnets; yet it is not too hard to imagine a future where the global IPv6 address pool becomes constrained due to service-provider inefficiency.
what is the life expectancy of IPv6? It won't live forever and we can't reasonably expect it too. I understand we don't want run out of addresses in the next 10-40 years but what about 100? 200? 300? We will run out and our decedents will go through re-numbering again. The question becomes what is the life expectancy of IPv6 and does the allocation plan make a reasonable attempt to run out of addresses around the end of the expected life of IPv6.
Jeff S Wheeler <jsw@inconcepts.biz> Sr Network Operator / Innovative Network Concepts
james