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Design ideas, questions. Why don't they...
Why don't manufacturers put two wipers on the rear windows of some SUVs and wagons?
To improve aerodynamics, why don't they move the radiator under the vehicle? (Into a protected tube, within a shroud or something.) Or onto the roof or even in the trunk lid - you'd want a power trunk then.)
Why don't they put a 360 view degree view camera on the roof of cars or something like a periscope to the rear view mirror.