Depends on what you do. YouTube should work fine, netflix does as well. That more than 50% of traffic for some. The long tail is indeed long :-) There with no

Depends on what you do. YouTube should work fine, netflix does as well. That more than 50% of traffic for some. The long tail is indeed long :-) There with no transition tech you get about 4.8% [1] I think there are two strategies: 1) keep your network as dualstack until the above %% is sufficiently big (how big ?) and then just turn off ipv4 and if something is not available, "too bad". 2) add the band-aid to go ipv6->ipv4 (nat64) and turn ipv4 off in the network as soon as the above %% is sufficiently big (how big?) The additional factors are presence of NAT44, OS mix, network management, etc... Too early for both now, but I am betting (2) will happen earlier. What do you think ? [1] http://www.employees.org/~dwing/aaaa-stats/ http://www.employees.org/~dwing/aaaa-stats/