Why can antelope still run faster than most cheetahs?

What I mean is that you only see what survives. The thousands of products which used to have lead which don't anymore are gone, out of sight out of mind. The ones which someone forgot, or someone bribed a politician to preserve, or even ones which were created specifically afterwards and which the law had no way to even know about, to ban, are what you see.

Dynamic systems have this property, and it's hard to get permanent dominance since both sides keep adjusting.