Some other things I ate as a kid that aren't around anymore are:
Hershey's Chocolate Milk mix in powdered form. Tasted awesome and dissolved far better than Quick. I mourned the day I heard its demise actually reported on NPR.
Fruit Brute and Boo Berry breakfast cereals were far better than that Franken Berry crap that outlived both of them. I don't recall what started an idea to produce monster themed cereals back then, but GODDAMN YOU FRANKENBERRY!, [shakes fist at sky]
Speaking of breakfast cereal, after ditching the sugary kids stuff, I grew fond of BucWheats. Other than the name and the fact that it was oppressed by other cereals, there was nothing racist about it. It had a touch of honey and was pretty damn healthy.
Do they still make Hubba Bubba gum? Now that I think about it, I haven't noticed it in years. It was better than anything at the time because the flavor lasted longer than any other gum on the market. It also had a granular texture I enjoyed chewing, but since no other gum seems to duplicate that characteristic, I guess that might be why it got shitcanned.
But I can think of at least one product that was previously taken off the market that has now returned....absinthe. Stuff makes for s smooth nightcap and is damn fine in a Sazerac.