[Dagger2]

There's also the question of whether we should be tracking percentage or number of users -- there's about 3 billion v6 users at the moment based on Google's stats, but 12 years ago there were only 3 billion Internet users in total. Even if the percentage was flat, that would still represent ongoing v6 deployment for as long as the Internet itself is growing.

(As a side note, Google and APNIC disagree significantly on China's deployment percentage -- 6.5% vs 52% -- so there's actually something like another half a billion v6 users not represented in Google's stats which would push the world percentage from ~48% to ~56%, and that "x years ago" stat to 10 years ago.)