Unless there were some insane advancements in Preservatives in 2077... No food can survive after 200 years. Even sealed food can perish, especially the Salisbury Steak or can of beans. Most canned food is canned in acid conditions. That prevents a single bacterium spore that may have wafted from the air from falling on the hot food and surviving in the food. The acid will cause the food to undergo a slow oxidation reduction reaction. This will cause the food to become inedible. How are people still eating Pre-War food? We've clearly seen in the Endurance video that people still survive off of "Packaged stand-bys".