My concern on the F-35 is that compared to other fighters its kinematic performance is compromised. For all those partner nations that don't have an F-22 to sweep the sky that makes it a dubious choice.
The stealth characteristics are fundamental to the airframe. Over the next 20 years radars are going to evolve while the stealth performance of the
F-35 really cant. When you negate the stealth you get an aircraft that isn't going to have a fun time against advanced Flankers of PAK-FA.
It cant turn well, cant run well and has a limited internal weapons payload. What is it going to do when some of its long range first shots miss?
Which they will since they will be near max range for the AMRAAM and Px kill will not be near 100%.
i worry that compromising the airframe performance to achieve a modicum of stealth, and accommodate a STOVL architecture is too much compromise for
something that needs to be able to achieve air superiority for 20+ years.