Coffee is an important substance to all of humanity. Not everyone drinks it, but everyone has benefited from its effects on those who do. If we ever establish human colonies in space (which might be our only chance of survival some day), we will need new ways of growing coffee. Synthetic coffee-esque drinks will surely be invented, but the future will still have people who will do anything for the real beans. I don’t know how, but they will find a way, and the story of how they do it will be worth reading.
note: Similar situations will arise with other foods, but those stories will be boring and I will not possibly use them in something later.