I think it's more that the possibility space for exploits is so large that a dedicated force of highly creative reverse-engineers is all you need to dig them up.
From what I've heard it can be almost trivial to find them if you know what to look for. But it seems that very few people know exactly where to look, and fewer still understand how to interpret the results.
From what I've heard it can be almost trivial to find them if you know what to look for. But it seems that very few people know exactly where to look, and fewer still understand how to interpret the results.