True, but irrelevant to my point. Whether a particular ISP supports doesn’t matter: it is being widely used by the rest of the world, to the point that it’s half of Google’s traffic.
Vodafone's network is reported to handle around 20% of the world's traffic. It's not a random ISP. It's network does not support IPv6. It is how a big chunk of all internet users experience the internet. Claiming it doesn't matter in a discussion over IPv6 adoption rate is ludicrous.
One of the world's largest ISPs, Vodafone, is yet to support IPv6.
What Google supports is irrelevant if your ISP can't handle the traffic.