IPv6 is just like the transition to Python 3: it'll happen... eventually. But the only people with an incentive to put the hard work in are people who are genuinely enthusiastic about the transition. Everyone else is sticking it in the too-hard basket.
This is a fairly outdated meme by now. Just that the enthusiasts are loud about it. Everyone else does not rush tell the world about their plans - it takes on average about 3 years to get everything in place, so this is a pretty good head-start against the competition :-)