And I've only ever had v6, both on DOCSIS and fiber. Both observations are pretty useless in the grand scheme of things; actual adoption rates are what matter.
> At this point it would be best to recognize the sunk cost and give up on the migration.
That's a pretty wild thing to say in the comment section of an article about v6 reaching 50% eyeballs-side deployment.
After 30 years, with 99% of servers and devices having been designed decades after ip6 was created, half of traffic is still ip4.
If that’s not a failure I hate to see what is.