In this Washington Post article, Adrian Higgins explains "Why the Red Delicious No Longer Is."
"Who's to blame for the decline of Red Delicious? Everyone, it seems. Consumers were drawn to the eye candy of brilliantly red apples, so supermarket chains paid more for them. Thus, breeders and nurseries patented and propagated the most rubied mutations, or "sports," that they could find, and growers bought them by the millions, knowing that these thick-skinned wonders also would store for ages."