There was a photo a week ago of a Russian attack on a bunch of fuel trucks. It looked like 10 trucks were lined up practically touching bumpers on the side of the road. All in flames.
It doesn't take a whole lot of dispersal to where the attacker has to expend one bomb per truck -- instead of taking out nine or more at a time.
When you're in that state, you're soon back to guns only... And, even in slo-mo, the GAU-8 only has a limited number of bursts available... Same for the AC-130...