What hardware, especially ASICs, do not support wire speed IPv6 and have not for a decade or two?
T-Mobile was gave a presentation on going IPv6-only in 2017:
> For the past 10 years T-Mobile has worked towards creating an IPv6 environment and we are now getting very close to our goal. Stephan presents learning on how to successfully enable IPv6-only using DNS64 with or without 464XLAT. He will do a live demo of the different IP interfaces on an Android handset. Finally, he will discuss and give some best practices on how to handle DNS, applications, and websites that are having issues with DNS64.
What hardware, especially ASICs, do not support wire speed IPv6 and have not for a decade or two?
T-Mobile was gave a presentation on going IPv6-only in 2017:
> For the past 10 years T-Mobile has worked towards creating an IPv6 environment and we are now getting very close to our goal. Stephan presents learning on how to successfully enable IPv6-only using DNS64 with or without 464XLAT. He will do a live demo of the different IP interfaces on an Android handset. Finally, he will discuss and give some best practices on how to handle DNS, applications, and websites that are having issues with DNS64.
* https://www.youtube.com/watch?v=nNMNglk_CvE
So they started in 2007.
Whatever ISP you're with has probably had at least 2-3 tech refreshes in which IPv6 hardware has been available.
For the CPE, Free in France had IPv6 in 2007:
* https://en.wikipedia.org/wiki/IPv6_rapid_deployment