2^56 prefixes seems like plenty. Every person on earth could have millions of them! Also, only 2000::/3 is actually allocated to global unicast, not the entire

2^56 prefixes seems like plenty. Every person on earth could have millions of them! Also, only 2000::/3 is actually allocated to global unicast, not the entire IPv6 space. If what we're doing today is "wrong" we have several more chances to fix it.