The Importance of Commonality in Pilot Training

There's an enormous incentive to buy the next iteration of that plane. It just saves a lot of money and it certainly makes sense if you have the whole line of A320s, right? You can apply that can fly to A318, 319, 320, 321 cockpit so it makes sense. Same with the with different vintages of the 737 but I think when you get into really different sized airplanes even if the cockpit is very similar there are differences.