The Russia-Ukraine war is highlighting the issues with over engineered Western weapons in sustained conflict. If you don’t dominate the opponent logistically, they’re impractical.
Thats an odd take considering a relatively small number of western weapons in the hands of talented Ukrainian defenders are holding back the entire stockpile of Soviet weapons designed to conquer Europe. If anything its highlighting the “over engineering” for survivability is allowing the much smaller Ukrainian army to win against the alternative of simple Soviet designs en mass.
I will point how however that the USA isn’t using F-35 exclusively, but also F-15EX which is much cheaper. They compliment each other well for their suited goals.