I don't agree. Cars generally get bigger and bigger same as the people. Just compare Golf I with Golf VII. Golf I is smaller than today's Polo! The trend in the rallycars is mainly given by the efficiency. While big cars are simply too big, heavy and clumsy, too small cars are difficult to balance and tend to be unstable on high speeds. That's why we have the cars as we have. They are neither too small nor too big. The only difference is that while the needs and wishes of car buyers moved towards bigger cars the needs of motorsport stayed same.