GS, another aspect of canned goods longevity is the temperature it is stored at. For example a cool/cold basement will have things last years longer than a warm/hot garage or shed. This is one advantage of cold northern climates where pretty much everyone has a basement.
Generally speaking I need to start from scratch more or less reorganizing my stuff in the basement which is where most of the preps are. The garage & storage room above could use a good cleaning but it is moderately organized being I did that when I moved all of the gardening related supplies into the new greenhouse/potting shed the year before last. The house closets could use a going through so as to make room for household stuff that otherwise gets shoved into the basement competing for space with preps.