Slightly oversized, high clearance Aptera with the rear hatch adjustable in height (sliding sides). That's my dream car. By changing the hatch position it could transition between hyper-efficient, long-range/fast streamliner (hatch all the way down); crossover (hatch nearly level, rear seats up); cargo van (hatch nearly level, rear seats down); pop-up camper (hatch up); and if removable, even as a pickup (hatch off). The high clearance (such wing-shaped vehicles can get high clearance without sacrificing efficiency) would let it offroad too. I mean, how awesome would that be?
Some day. I hope...