You’ve made a huge mistake ...... is what people usually say whenever I tell them I’ve ordered the would-be food substitute Soylent. I’m starting to believe them, because an order I placed last November has yet to show up, despite promises from the company that makes it. And I'm not the only one complaining about missing Soylent.Soylent UnseenThe smoothie-like nutritional drink made waves last year when its founder claimed the vitamin-rich potion could replace eating by providing powdered versions of the nutrients their body needs to survive.