It's surprisingly common. A lot of standard features (reclining seats, AC, large fuel tanks, back seats, large trunks, fuel efficiency) aren't important to all

It's surprisingly common. A lot of standard features (reclining seats, AC, large fuel tanks, back seats, large trunks, fuel efficiency) aren't important to all buyers, but they're important to some buyers. Over time they creep into the standard feature set as manufacturers design new models because the economies of scale from additional customers and a simpler production line outweigh the additional costs.