It's a failure of "eugenics": aggressive artificial selection amplifies trade-offs, and by the time the market picks up on the fact that trade-offs exit (in the

It's a failure of "eugenics": aggressive artificial selection amplifies trade-offs, and by the time the market picks up on the fact that trade-offs exit (in the case of Red Delicious, mostly having to do with taste of the fruit), consumer tastes shift, and the formerly selected-for traits become very unpopular.