This may be a frame rate issue but here goes.
When I crash, auger, or get shot down, my plane explodes and thats it. Everything is vaporized.
What would it take to have a crashed plane to stay on the ground and burn and / or smoke for an extra 30 seconds to a minute or even two? It would make more smoke, and flames but in a huge attack would add a huge factor of realism and chaos. The same for tanks that are blown up. Imagine a ton of crashed planes on the ground burning as as the attack ensues!!
Secondly, when a base is on fire, making a small cloud of smoke over the base would be cool too. It would make bases harder to re-attack but thats the way it was anyway. Or would this totally eat frame rates for lunch?