Ipv4 is not even ipv4 compatible. You use nat to translate one type of ipv4 into another to talk on the internet. Ipv6 is using nat in the same way.
The problem is that ipv4 is not forward compatible ( naturally ). So ipv6 can talk to both, ipv4 only to ipv4.
This is the fucking truth. It is also a very easy solution, most people want children, it is baked into our genes. It is just when the countries of the world have made the rules like they are now. That encourages ans premieres the hoarding of wealth into the hands of very VERY few. At the expence of exploiting everyone else and the planet. It makes human civilization a dystopia not worth saving, and not wanting to put children thru this meat grinder, in order to enrich some asshole, is very normal and compassionate.
Make rules that are fair, and protects the planet. at the expence of some billionares having to be millioneres. And I bet most people would love to have children.