By that chart, the IPv6 rollout will be basically complete by 2030. I suspect it will speed up near the end though as the first few services start to go V6 only.

That is a really nice chart, thanks for sharing.

What is confusing me is the Netherlands. We only have about 13% adoption. I'm on one of the largest ISPs KPN and get 10/10 on IPv6 tests. Is this because I use a custom router? I'd expect it to be a lot higher since apparently KPN supports IPv6.