I'm not sure the F-16 analogy holds true. There are still F-16s in service that were built in the 1970's that have gone through a midlife update with capability enhancements that exceed the original F-16C.
The F-16C did not replace USAF F-16As on a one-for-one replacement either as the early F-16Cs replaced other types first. Force reduction measures had a heavy hand in delivering F-16As to the boneyard or to see them exported to other countries.