
I would think if it was a desperately needed capability, it'd be there right now (or at least funding for it). The greater priority seems to be getting the AIM-120D and 9x/block II/III on the jet.
It's been said legacy birds have around half a dozen ways to look for/track/get a firing solution on enemy aircraft. Has also been said the F-22 has around 300 and the F-35 600 plus.
I can only name a few: Radar. IRST. Electro optical.
How the hell are they coming up with "hundreds"? I mean, OK I'm not an engineer dealing with these things but... hundreds? If so, more power to them. In any case, the F-22 as is has "ways" of finding, targeting and destroying enemy aircraft before they even know they're under attack. Ditto for the F-35.
I'm sure glad I'm not flying Flankers for Russia/China...