Well as the starter of this thread,
Is it from being lazy which I'm guilty, Is it that players don't want other players too know how bad they are in tactics,
Is it that players don't know how to do an AAR, Is it that players don't know where to post AARs,
I'm guilty on all above,
but never did it accord to me that because the length of the scenario could also be a reason for not writing an AAR, it never cross my mind.
I like that term "During Action Report" (DAR) might give it a shot.