I look at products like Hershey's chocolate or Reeses more like their own category of processed food, kind of like Spam. They have a close, but not exact resemblance to "normal" chocolate or peanut butter, but they're also sort of an acquired taste, and I think their customers would be upset if Reese's Peanut Butter cups suddenly tasted like the Trader Joe's versions (with real peanut butter instead of a mysterious chalky peanut-flavored substance), or if Hershey's stopped using the butyric acid process that makes them taste like vomit to non-americans.