https://www.google.com/intl/en/ipv6/statistics.html it's still going up (we are in some sort of cyclic downturn right now that I don't understand).

Next year that chart will finally cross 50%. It was a mere 30% in 2030. Developing country mobile phone networks will continue to push it higher.

All we need to do is start having rich governments mandate IPv6, and also mandate IPv4 downtime as a punishment for those that don't comply / chaos engineering for the system as a whole. Then we can quickly finish the job.