Comcast and Verizon will dual stack you, sure. As the largest two ISPs, they're out of addresses. But a lot of other ISPs won't, my ISP doesn't support IPv6 at all.

I’m more talking about what people are actually aware of. Yes, most systems have IPv6 enabled and use it when possible, but it’s mostly invisible. When you login to a device to setup the IP address, it’s still almost always IPv4. That’s just for the internal networks, which is what most home users are thinking about on this topic.