They are not inter-operable between IPv4 because it is based on hardware
practically all IPv6 deployments are dual-stack it's not very noticable when IPv6 is misconfigured because practically all software silently falls back to IPv4.
- IPv6 does not provide fragmentation
- mobile network is mostly ipv6
IPv6 Notion
IPv6 transition
Due to the lack of real lasting benefit
ISP Column - October 2024
I wrote an article in May 2022, asking “Are we there yet?” about the transition to IPv6. At the time I concluded the article on an optimistic note, observing that we may not be ending the transition just yet, but we are closing in. I thought at the time that we won’t reach the end of this transition to IPv6 with a bang, but with a whimper. A couple of years later, I’d like to revise these conclusions with some different thoughts about where we are heading and why.
https://www.potaroo.net/ispcol/2024-10/ipv6-transition.html
Brace yourself, IPv6 is coming
On February 1st 2024, AWS will start charging for IPv4 addresses. This is a big deal for the internet, and we're here to help you prepare.
https://supabase.com/blog/ipv6

Going IPv6 only
Since we're slowly coming up to 25 years of having IPv6, but still not actually having IPv6, I tried making a seperate local network that only has v6 access. In theory quite a few of the popular internet services should have IPv6 connectivity working.
https://blog.brixit.nl/going-ipv6-only/

The IPv6 transition | APNIC Blog
How much longer is this transition to IPv6 going to take and does it even matter?
https://blog.apnic.net/2024/10/22/the-ipv6-transition/


Seonglae Cho