Probably advertising. For us in my childhood, soda was strictly a weekend thing. It was almost a ritual. Saturday morning we ran errands & grocery shooped. Saturday lunch consisted of hot dogs, ice cream & soda. Otherwise it was limited to outingd, amusement parks, the beach, going to the movies. In the house we had apple & orange juice, milk, water... no shortage of things to drink.
Shush - because the sofa bears don't know.