IDK if these are gone or just unavailable at my local stores here, but:
Kroger brand used to have sour cream and onion thick crunchy potato chips with ridges. It was hands down my favorite chip and cheap as hell. No idea what happened to them. I even asked and they didn't have answers for me.
Costco used to have an ice cream treat. I can't remember what it's called, but it's vanilla ice cream in between two oatmeal cookies all covered with a chocolate shell. It was insanely good and just disappeared one day, forever.