There are still tons of ISPs refusing to have IPv6. For instance in my country only one of the three major ISPs has IPv6.
this post was submitted on 16 Jun 2023
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Hopefully once Google and other stats get over 50% there will be a "look at the majority" effect. Most ISPs in my country already support IPv6 with a couple IPv6 only with NAT64 on the edge. But I guess we'll just have to see.
I really hope you're right. I'm one of those people who believe that we should simply abolish IPv4 completely. We have zero need for IPv4 and dual-stack networks are way more prone to errors and complexity.
People usually say that IPv6 is hard and IPv6 addresses aren't "memorable" but that's mostly BS because with the :: aka "reduced format" they can be even simpler than IPv4. Others might say it is dangerous without understanding how NAT isn't necessary and how a firewall should work. Another common argument against deprecating IPv4 is that we should keep compatibility with older devices, to which I say... IPv6 support was introduced in Windows XP SP2 (2004).
IPv6 is great, largely simply networks, make things more efficient and allows for more complex scenarios that are hard to deal with in IPv4. Multihoming, advanced load balancing, network level split DNS, direct peer-to-peer communication, totally abolishing DHCP in a usable way etc.