coffee consists of perhaps 40-50 key aromas, each behaves differently, and often the same compound can have a positive and negative smell attribute, which changes only with its concentration
for each coffee, there will be a different peak concentration of each of these aromas for the optimum experience. The extraction method plays a role, and the optimum might be different if we use the coffee for espresso or for filter coffee
for instance after 2 weeks, there may only be 20% of the methanethiol left and 80% of the methylpyrazine left
storing coffee in the freezer will prolong the coffee freshness for about 10-times, but it should be within a sealed container so that humidity and smell from other food in the freezer does not migrate into coffee beans. When using, allow 1-2 hours for the container to reach room temperature before opening.