The P-8 was canceled? Well, someone better tell Boeing and Pax River. They are still building the thing and Pax is still slow rolling the testing.
My point about T&E is especially towards the P-8. Here is a 737 Airframe, the most widely produced aircraft in existence and the Navy plans to take 3 years testing the damn thing. They also want Boeing to figure out how to De-Ice the tail in flight (without an increase in weight) because Turbo-Prop guys do not understand how larger jet aircraft work.
BTW The Boeing P-8 Poseidon (formerly the Multimission Maritime Aircraft or MMA) is rplacement for the P-3. It is intended to conduct anti-submarine warfare, shipping interdiction, and to engage in an electronic intelligence (ELINT) role. This will involve carrying torpedoes, depth charges, Harpoon anti-shipping missiles, and other weapons. It will also be able to drop and monitor sonobuoys. It is designed to operate in conjunction with the Broad Area Maritime Surveillance unmanned aerial vehicle. The P-8 is to be built by Boeing's Integrated Defense Systems division from the 737-800.