The idea for the jets themselves are 36 yrs old. TMK the newest were the Block 16 mods. We may have some that old? Why the question. F-16 have been fly by wire for some time.
My opinion.
There had to be reason our President asked for so much military money.
I watched over 100 rallies and he talked about our old planes using parts from old scrap yards or wherever. He said many times its an embarrassment that we didn't have new up dated equipment.. NEW equipment is needed in all military areas..his words.