You said "I don't know why tastes change like that." Another recent poster said he/she is convinced that they romanticize the foods of their youth. I've been thinking about that a lot lately as time has passed , and others like Mayor Al have mentioned it too -- have our tastes changed, or our memories, or the food?
All, I would bet. Boy, do I remember what a treat that old limited menu at McDonald's was in 1962, to us in the white bread midwest, those skinny burgers and crisp fries were well loved as a new and unusual thing. We didn't have anything else like it! And Burger King, with their old fish sandwich called the Whaler, which was huge and delicious, delicious at least to us at the time. Many others, too.
When we moved to Omaha in 1971 and first encountered Arby's, they made their sandwiches so big that my new bride and I would actually buy some other buns at a store, and take half off the Arby's to make twice the sandwiches. Boy, are those days gone!
At the same time, we here in the white bread midwest do have our specialties, and I can safely say that a fish dinner around here is every bit as good as 50 years ago. And a good steak still has to be a good steak, right?
I would pay a lot to have a few bites of some of that stuff I remember so fondly as a kid, just to find out.