I don't see a likelihood for any vaguely symmetrical hot war anytime soon. Who would we fight? Russia probably doesn't need fighting, just cut off their trade and wait. China and the US are far too dependent on each other. Europe wants to be buddies with everyone. Nobody else has the capability. If those situations change, by the time they do, I think sending manned aircraft into war zones to get shot at will be an obsolete technique, akin to sending in battleships to fight an enemy navy after the rise of the aircraft carrier. Another couple decades of technological advances will change things a lot.
