I find partial IPv6 support quite useful. For example, at home I have a lot of services where it it convenient if I can access them but it is not essential. I give those services IPv6 addresses. I have IPv6 at home, at work, on mobile. So it is not a big deal if I can't access them from some part of the world. With increasing prices of IPv4 addresses, I expect that more internal services will move to IPv6.

For services at home, where I do need IPv4 support, access over IPv6 is simpler and more robust. We can expect more of that in the future. Increasing prices of IPv4 addresses, certainly if for routing purposes you need a /24, may result in worse traffic engineering for IPv4.