The Russians apparently have 600 tanks queued up right now for an advance. And while apparently they don't use the tanks as mobile guns for their infantry there is probably a good number in support of those tanks, and it seems unlikely one would fire missiles at infantry. Which is why we were dumping 50 year old stockpiles of dumb bombs in Afganistan. Which leads to the question of how one maintains air superiority for flying bombers in the face of more advanced MANPADS...