If one of your late ancestors were to come back from the dead and join you for dinner, what things about your family would this person find the most shocking?
If it ever happens, the most shocking thing would be eating leftovers and warming them in the microwave oven. Back in the day, there was nothing left over after dinner. Whatever was left was given to the servants.
Food eaten one day to them loses its taste the following day. They were used to eat fresh food. They were not aware of frozen foods, they would have declined to eat frozen food.
In their time, there were no such thing as canned or frozen foods. They’d be shocked to eat preserved food.
Lot of changes have taken place in our eating habits, whether these are good or not so much is not easy to know. People live longer as compared to our ancestors, probably due to availability of better medication and physicians.