I would love to stop paying AWS for public ipv4 addresses.
But simply it is impossible to go full ipv6, as many of isps of the clients do not support it.
Currently there is no pressure to the isps to move to ipv6. In fact the incentives are OPPOSITE! They love charging for static IPs.
To be fair if Google stopped supporting it that’d be a pretty good incentive for the ISPs to get in line.
That is a great idea actually. It would be awesome to be implemented like 2-3 years ago. Now I don't think it will work at global scale, since the world looks for any excuse to move away from American influence.