I heard it had to do with the jsf and the superbug. While the new 18 can have 2 seats, they have them set up for 2 pilots not a pilot/rio/. It will take some time to split up the weapon systems and get the bugs worked out. Also, the marines were getting the bulk of the 2 seat superbugs. I think the 14 will be around for 10 more. I hope. All I want for christmas is a 14 seat.