Is it? There are many benefits in principle to IPv6, but if my ISP continues to assign me a single dynamic IP, those benefits are entirely moot for me.
Reality is that lots of ISPs do this right. And have for a very long time.
The fact that porn was allowed on VHS wasn't a failure of the Betamax technology.
Preventing key-jamming on typewriters is not a failure of Dvorak.
The technology does not matter, the real world decides. Right now, there is no reason for people to care about IPv6, other than when it's the cause of issues.