I used to work in a grocery store. I had a conversation with the lady in Floral (she was ancient) about Red Delicious apples. I guess they used to actually be delicious, so she says. Something went wrong over the years.

One thing I can tell you from experience is that they're weirdly resistant to decay. Everything else will go bad in patches. If you've got a bad orange, you've probably got eight partially bad oranges next to it. I saw a bad red delicious apple once, the rest of the case was pristine.