I haven't spent a lot of time with my power grid either, but I do expect the light to go on when I press the switch.

(Needing to dedicate time for it is, to some extent, either a failure of the protocol or at least a contributor to the lack of adoption.)

In my experience IPv6 has always "just worked" for me in the consumer space. The only difficulty I have found is when implementing it into an existing managed network. Most organisations will not touch it, they're too comfortable with IPv4, unfortunately.