I recently switched from a crossover SUV (Nissan Rogue Sport) to a pickup (Sierra 2500 with crew cab and 8′ bed). It is about 22 ft long, and yes, it is both harder to park and usually unable to fit fully in a standard parking spot. It overhangs by only about 2 ft usually, though, so if it really is feasible to make a six door vehicle that is about 200″ long, it would still fit.
I recently switched from a crossover SUV (Nissan Rogue Sport) to a pickup (Sierra 2500 with crew cab and 8′ bed). It is about 22 ft long, and yes, it is both harder to park and usually unable to fit fully in a standard parking spot. It overhangs by only about 2 ft usually, though, so if it really is feasible to make a six door vehicle that is about 200″ long, it would still fit.