The problem with this whole segment is that its large-scale adoption is being driven by gov't regulation, not the market itself. If there's consumer demand, you can figure out what they want, and a large scale manufacturer (like Ford) can leverage its size and capabilities to make what meets the demand. For a segment like this, where it's really a niche market that's being forced into wide adoption by outside forces, how do you figure out what meets that need?
In my case, I'm not parking where I have access to charging every day, but that doesn't mean I never park where I can charge. F'rinstance, my car is frequently parked at my brother's house on the weekends, so I can charge there, and with a 150mi range, I could drive my daily commute all week without burning any gasoline.
I can remember 5-8 years ago I think, Ford was working on a reciprocating engine to be a range extender for the F150. Can't find anything on that though. It was similar to a hydraulic piston going back and forth.