[usr1106]

An average user is not expected to do that. But I understand there are mobile operators out there who have been doing this (instead of NAT) for a while because they don't have IPv4 addresses for every consumer subscription? Wasn't T-Mobile US one of them? (Not living in the US.)

[BlueTemplar]

An average user shouldn't be able to find hardware not supporting IPv6, because it shouldn't be allowed to be sold. (And soon, hardware supporting IPv4.) Just like it happened with digital TV standards.

[dolmen]

Yes. Like EU making mandatory the standard for phone chargers.