What is the "legitimate" market space for large vehicles?  10% of what the market actually has been?

And, then, as well, one has to wonder whether there will be real gains in the fuel efficiency at the 'large' end.

For example, I have viewed the "minivan" as a space truly open for PHEV.  Why?  Relatively large vehicles, able to 'sacrifice' some space for early generation batteries/such.  In a market space which cares about gasoline prices &, to a certain extent, environmental image.  And, generally, sold to people with some legitimate claim for 'size'/seats. (The neighbors with five kids (included the adopted) & such ...)  Sigh ... the Chevy Volt is a two seater.

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