Couple of things for me.
One is tiny croutons. I don’t see them anywhere anymore. They taste the same but it’s kind of a pain sometimes to keep the big ones on your fork. The small ones were a little more satisfying to snack on too.
Second is Blue Nehi. Never met anyone else that’s tried or heard of it. Damn it was good though. Big Blue is kinda similar but those always taste under carbonated.
Joe’s O’s, the way they used to be. They were basically Cheerios but 10x better. Then sometime several years ago, they updated the recipe and it has a weird bad taste to it. Singlehandedly took it from my favorite cereal of all time to have not even considered it in years.