We've played a few games now, and one thing we've noticed is that certain buildings will disappear in the blink of an eye, and certain players will be left without the capacity to build them. Also, in our latest game, myself and the guy next to me developed flight in the same turn. We managed to completely empty the aircraft unit deck.
I can understand placing limits on units and buildings, but why place a "global" limit? What, my buddy can't build planes any more because we already depeted the world of qualified pilots? The germans can't build any barracks because the americans and the egyptians built them all?
What are people's thoughts on this mechanic?