IPv4 "works" and ISPs are incredibly resistant to changing things that "work".
Because support is needed basically end to end, it's going to take an ungodly amount of time for ISPs to figure this stuff out.
It's pretty frustrating having all my hardware support v6 with the only barrier being my ISP who refuses to support it in my location (they support it in other locations).
IPv4 "works" and ISPs are incredibly resistant to changing things that "work".
Because support is needed basically end to end, it's going to take an ungodly amount of time for ISPs to figure this stuff out.
It's pretty frustrating having all my hardware support v6 with the only barrier being my ISP who refuses to support it in my location (they support it in other locations).