Traditional four-wheel-drive systems have a weight and cost penalty. And they usually come with bigger wheels and tires, more electronics, a liberal use of heavier metals, and in many cases protective skidplating. The weight penalties alone can add up to several hundred pounds and can significantly affect fuel economy and driver handling dynamics. Other drawbacks include added maintenance, more expensive initial cost, and the silly belief you can drive anywhere when the weather or terrain gets bad. We’ve seen more four-wheel-drives on the side of the road during a snowstorm than just about any other type of vehicle. It doesn’t matter how good the four-wheel-drive system is, one unknowledgeable driver can override any well-designed technology.