Quick Benzobait is predicting we will gain 40 aircraft in the next 5 years and then in 2018 we will give ALL of our jets away. Logic. Not so much.
Back to the attrition. The same reason and logic that says the top 1,000 will not leave jetblue is the same logic that the top 6,000 won't leave Delta. With the possibility that there could be an age 70 waiver at some point you can logically expect to be a 717 co-pilot for your career at Delta. (That's a little dramatic) The opportunity for flying larger aircraft and upgrading to Captain within 4-5 years is a reality at JetBlue. Growth into new markets with new products is exciting and will bring new customers. You have to stick around to see what happens.