Nobody buys a Mustang because he or she needs a Mustang.
People buy Mustangs because they want a modern version of an automotive icon. Mustangs make drivers feel good, there’s not much else to it. They certainly don’t offer much in the way of transportation for large families.
Industry analysts happen to know that the automotive market is doing quite well when people buy Mustangs, along with other cars they don’t need. When sales of performance cars and other discretionary models start to dip, a slow-down in the rest of the market probably isn’t far away. It’s like the Farmer’s Almanac of the auto world.