I'm 6'4" 245 lbs (193cm 111kg). I don't fit in a Miata. Literally. In the passenger seat of my roommates Miata, my knees nearly touch my chest. I don't fit well in a lot of small or even medium size cars.
I drive a Chevy Blazer, which is a modestly sized SUV. Although it doesn't get great gas milage, I don't think it is excessive in the least. I frequently use the nice amount of cargo space it provides, and I can tow a trailer when the occasion arises (as it does several times a year.)
Just remember, when you lump together a whole group of vehicles, you lose the good with the bad. Do I think that Excursions are necessary? Not for most people. But for that drummer who has to haul around his rig, or that rider that carries saddles, I think they should have the freedom to buy whatever vehicle meets their needs. I that means they have to be available to soccer moms too, so be it.
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~ John