Just because Intamin uses math and cad doesnt mean pumping cannot exist. They still have to engineer it correctly
And if someone made a ride and designed it to be like those rides, Big D, Silver Comet and Coaster, I wouldnt dock. Of course, they may take a little more work to make them work right, but if someone made a ride like that and it was made like those old ones, I wouldnt have a problem.