I ate Cheerios growing up. On a funny, or tragic note if you are a rat, in the 80s, one of the Universities did a study, where they fed rats nothing but breakfast cereal. Only three kept the rats alive, on the others, the rats stuffed themselves and died! Only on Cheerios did the rats thrive, the other two, they barely survived! So I am glad my Mom bought the bland cereal. As to the others, we must have been to poor to buy all those things you mentioned. Some one must have been buying them, just not my family or friends families.Ever eat a hyper-sugared cereal with a cartoon character on the box? Those didn't exist before the war, but they absolutely exploded with the coming of television. And the Boys saw to it that they were displayed on the bottom shelves in the new supermarkets, at exactly the right height to be spotted by and made the target of nagging by children.
The Boys also began pushing "family size" bottles of soda in the fifties, the better for serving the kids at the table. This took a long time to catch on, so they diversified into "fruit flavored" sugary drinks presented under the illusion of being "healthy. Coca-Cola made a big hit with its "Hi-C" line of fruit drinks containing much more sugar than actual fruit juice or Vitamin C. "Hawaiian Punch" was another such fake-healthy sugar beverage that found its way to many Boomer tables.