I can't say I'm a big proponent of IPv6 mostly due to its ability to tie unique IP addresses to Mac addresses in a 1:1. https://www.reddit.com/r/HomeNetworking/comments/vu3zji/does_an_isp_use_the_mac_address_to_issue_an_ipv6/
I think this potential condition is bad for the internet in general since someone always gets the bright idea to play "state censor" once a 1:1 relationship with anything is made.
Nonetheless, there is some sort of schism between Hurricane Electric and Cogent concerning IPv6 and its adoption which sounds a little like some kind of toll road problem: https://bgp.tools/kb/partitions
Probably a better solution to the whole thing is to forget about IP addresses AND mac addresses, and adopt some form of onion/mesh routing that randomizes a given number as a general rule for accessing the web and only allows for making it permanent when someone wants to hang out a shingle.