People do not want it
Most users are on home routers or cell phones . Cell phones just use what the phone companies supplies. The user has no interest in how it works. Small business and home users are satisified with IPv4. If you can not get adoption after all this time, you need to address why people do not want to move. IPv6 is just too complicated for the typical use case. You may need it for the Internet of Trash. But I do NOT want my light bulbs on the same network as PC and printer. The home NATing router is great protection. I do not care if the uplink is IPv6. But in my house - IPv4 is just easier.
Biting the hand that feeds IT
