All this talk about liquid food as a holy grail to pursue is intruiging but I wonder, what harm does it do to the teeth, oral flora and digestive system if they have nothing to 'chew' on? Just like our body slowly atrophies when we sit to much and move to little, perhaps our body needs the traditional 'holistic' form of food (not necessarily including raw food)?
We know so little about nutrition that it's risky to deviate too far from traditional cuisines. I would bet that Soylent has some detrimental effect if it's not part of a varied diet.
Also, for those eating, a safe measurement of food diversity is to try and eat all of the different colors.