Of course, if I were being flippant, I would just point out that the Afghan air campaign as it was, was more or less wrapped up within a few months. If memory serves, we had more or less run out of targets by New Year 02.
It's hardly Air's fault if the ground forces were inefficient and have dragged their portion of the operation out for almost a decade, the result being we have now mortgaged our entire military capability to put the equivalent of a Bde+ worth of combat power on the ground.
And before you ask, yes I am being tongue in cheek.