I’ve yet to live anywhere where the available mainstream ISPs were willing or able to provide IPv6 service. I’d be happy to use it, if I were able.
I also have built cloud infrastructure for multiple SaaS providers with tens of thousands of customers over the past decade. Only one customer I’m aware of has ever even requested IPv6 support. And if customers aren’t asking for it, my employers have never been interested in the full network re-architecture required to truly support it internally.
There are still several basic services you can’t run IPv6-only in AWS, and a handful of AWS service features that don’t support it at all.
As a sysadmin for decades now, I’ve always found IPv6 to be overengineered and in many ways completely ridiculous. But I’d love to be supporting it in everything I do. Only I still can’t, even after 20+ years of being lectured about it; even after complete IPv4 exhaustion has been reached. I don’t think we’re ever going to turn IPv4 off. At best it will be progressively hidden, even from technical users. And folks like me will just have to keep building workarounds to patch the holes where IPv6 still doesn’t work.