This is great news! It’s absolutely crazy how bad IPv6 adoption still is; it’s basically still impossible to run any service IPv6-only, even if it’s only for like, modern, expensive devices where I think it would be fairly reasonable to expect good support for "newer" standards.
It is literally this, coupled with nobody having time to learn or implement something new. Honestly, this is like the one thing that FAANG have been unambiguously good for since their v6 adoption is excellent and is most of the observed v6 traffic.