I am not sure how plywood would work today but hey, I think it would work quite well. A aircraft such as that would actually be far more effective at night, just as the B2 is, rather than a day strike craft although it would probably work there also.
The point is, and always has been, that if they have any fast movers, and believe me someone has them, then attack aircraft are useless. The Germans found that out when their JU87(Stuka)was shot out of the sky in vast numbers when they attacked great Britain without air superiority. Sturmovics(spelling?) only worked in Russia because of their armor and the fact they had control of the skys.
Without air superiority ground attack craft are useless, or next to it. A slow moving 200 MPH craft would be sitting ducks to ground fire(who needs missles with a plane that slow)and 37MM anti aircraft fire.