2,000 F-22(A) Raptors? Are you sure? There were only around 200 F-22's currently in service, with no plans to pull up production again (unless, of course, war breaks out.) this is mainly because the F-22 is so bloody expensive. And about the F-16, the newest variants are what we call a 4.5 Gen fighter, meaning that while it is not F-22 level, its been upgraded to a new standard. When we are talking about US upgraded F-16C Block. 52's and F-16E/F Block. 60's, I believe that they are fully capable of taking on Su-30's, Su-35's, EF2000 Eurofighter Typhoons, Rafales and the like. Also, based upon the current rate of F-35 progression, I believe until we start seeing the F-35 producing some actual results, we will not retire the F-16's, and even if the F-35 becomes the fighter its supposed to be, the F-16 and F-15's still have their own niches of being cheaper, and more maneuverable airframes.