A really excellent post about moving to IPv6
This really excellent post makes the analogy of upgrading to IPv6 being like moving to longer phone numbers. Not that the analogy is perfect by any means, but it is useful for illustrating some important differences in the attitudes of people towards it.
One cogent commenter mentions:
The telephone equivalent of NAT is a PBX with built-in extensions, but you're right in that no one is suggesting that PBXes will relieve the burden of upgrading the phone system at some point.