Originally Posted by
Gone Flying
the -10 will have the exact same engines as the -9 with a heavier airframe. If the -9 can’t do it, the -10 certainly won’t be able to.
Originally Posted by
DeltaN900DE
Exactly, the -10 is just going to be an efficient high CASM people mover with more premium seating than a 739ER, of course it will have the range to do 4-6hr flights, but no high performance routes at all. It will live at sea level and perform extremely well there with long runways

Excellent points. I think you are both correct. Wonder what Delta will do for high altitude airports when the 757 goes away?
Seems like 220/319/737-800 will be the only options