Except tribal areas, I doubt how will they be useful on our eastern front. Also, what makes you think the US would have "upgraded" the aircraft when it didn't do it in the case of f16s after soviet withdrawal?
^We could have never been too sure about that. You mean there is no damage to be done at nights in tribal areas?! What makes you so sure about saying this?
And regarding the upgrades no one can look into the future, nor can I. In this case I'm not the expert either.