It requires human effort to maintain any emotional memory. If you don't contact your relatives with a card or a call to remind them you exist, you don't enjoy a good relationship with them. And if the government doesn't periodically run campaigns like "don't waste water", people forget to conserve it. These are commons goods that the market doesn't ascribe any value to unless it is directly related to current product and service. Hence, we are flooded with advertising. There is advertising everywhere. But there is no such thing for "remember the last boom and bust."