I wonder if a new kind of airline would be successful where seats were not sold by ID, but by femur length. That way, they could set the seat pitch according t

I wonder if a new kind of airline would be successful where seats were not sold by ID, but by femur length. That way, they could set the seat pitch according to a continuous distribution matched to the passenger height. Now not only would they be able to accommodate--on average--the tall passengers, but they could squeeze in more passengers overall and thus make more money because the shorter passengers would be packed more tightly. That is, everyone would get exactly the same amount of knee clearance.