Because this: http://www.airlinepilotforums.com/re...ml#post1710988

Some guys in our new-hire class were past 50, many in their 40's. 33 is relatively young, and if predictions hold out you could be at a major for almost three decades. Some disagree with that assessment, but do your own homework and see what you come up with. Why even build 1500 just to give up now?