DING DING DING!!! WE HAVE A WINNA!!!
Andy nailed it. I have popped open jars that have been stored for months & years with these paks now & the flavor definitely changes, often for better. I have had a strain or two that seemed to lose flavor. Some strains I didn't really care for initially, 6 months later I'm kicking myself for letting that mother go as the taste was completely different & really good!
Potency didn't diminish drastically either, slightly yes but we're talking bud over 2 years old now.