The F-22 replacement is already under active development. The F-22 was a pretty radical departure from what came before it, and I think it served as a prototyp

The F-22 replacement is already under active development. The F-22 was a pretty radical departure from what came before it, and I think it served as a prototype for all the subsequent next generation platforms from which many things were learned. As good as it was, you aren't going to get everything right the first time and technology progresses.