What I'm trying to say is that these platforms survived a long time in the market due to exclusives. Now what if Nintendo didn't have these strong exclusive titles, would they still have consoles on the market? Would people be more interesting in owning one if they had less of exclusives and more of CoD, AC, Fifa, etc.?
Sure the platforms would be better positioned if they had everything and more, but I think an exclusive library is key to attract consumers.
Also I might be wrong, but aren't the top 10 best selling games on GB, GBA and DS exclusives published by Nintendo?