I don’t guess that most people would inherently expect all food to last forever, or even for extended periods of time. Surely all people are acquainted with canned food if they were alive in the last 200 years, however after having both canned and uncanned, fresh chicken, you would never expect the former to taste as enjoyable as the latter. Diminished flavor while in canning is a compromise the people I was with and I deal with to keep these foods for long, extended periods of time far past their natural expiration cycles. Even refrigerated chicken isn’t going to last genuinely long by comparison either. But this principle isn’t exclusive to food products. Cannabis might be a flower or weed, however the condition of that flower is going to deteriorate after the plant has been harvested. Since it’s a moist plant medium, cannabis flower products are susceptible to more mold problems while in processing compared to cannabis edibles or cannabis candy products more identifiably. If you don’t wash your packaging equipment, any spores from one batch of cannabis could easily get into another batch. By the time you’ve been using the jar for a week or longer you begin to notice that distinctive “musty” odor that accompanies various types of mold and mildew. Honestly this can happen just from the spores that are naturally floating in the air outside and inside buildings and other indoor spaces. That’s why I don’t try to purchase half a dozen different jars of cannabis flower products and expect them to list several weeks or longer. Instead, I try to use most of my cannabis within the week in which it’s bought. Even if the weed never develops a terrible odor, the terpenes are always breaking down as time goes on, making the cannabis inherently weaker as well.