What exactly does whole food offer that a meal replacement doesn't? Are we talking nutrients? Because those can be replaced. Are we talking about the form? Because form shouldn't matter much to a digestive track that is built to dissolve and pulverize food. So what makes "whole foods" so much better?
Better discussion then I can espouse. Small summary, we don't necessarily know why whole foods > substitutes, but they are, ergo risk of non-intake of whole foods doesn't make sense for some anecdotes of a few startup folks.
And if Soylent would actually have some experts on their team (be it bio, medical or nutritional, even a chemist!), they could actually do that, or be told why that wouldn't work.
(I wonder for instance if gas chromatography would keep in tact the larger complex molecules, but I don't know much about it either)