Most of our weapons programs only seem successful because there is no real opposition. A country that could put up airborne 24/7 radar could pick them out by banging on them from the top, and once found they could be brought down with harsh language.
The entire Pentagon approach to weapons systems is stupid. Over and over again the thing that wins is "good-enough" tech in overwhelming numbers and operated with sharp tactics. I get the feeling that the braintrust in the military saw too many "German secret weapon" movies.