How and why has food changed from 1950 to today's?

This would be practically an infinite list but to start:
Drinks with non-nutritive sweetners such as saccharine and Aspartame even though saccharine was being patented in 1950.
Potato chips made from dehydrated potatoes such as Pringles were not introduced until the early 1970's.
Because of distribution there are foods that were only available to local areas during the 1950's.
Ultra High Temperature Pasteurized milk came into being in the 1960's.