The only bad thing with canned food is that we get so much of it. Relatives and friends bringing pickles (dill,sweet,jalapeno,garlic), salsa, fruits, tomatoes, jelly/preserves etc..
we end up with 20x as we have room for. Otherwise, it's all good.
All I know is my brass alum and copper scrap finds at sales have went down quite a bit. Everyones a scrapper now it seems. Ill hit a few more this weekend surely.