It can cut us on a surprisingly deep level when something we really like gets discontinued. People who ever get a craving for McDonald's pizza know this struggle well, but in my case, part of me will always pine for a charbroiled chicken sandwich I used to get at a chain in my area.
While it doesn't give us the sense of loss that this phenomenon can cause, there's something a little frustrating about special, limited time promotions too. Someone comes up with this product that everyone wants and then hides it away for months while we salivate.
So that's why anyone who missed one particular sweet treat should be aware that it's coming back before it's too late.