While I share your dream of no longer needing to eat, we still can't really live on Soylent. Our understanding of nutrition is growing, including what we consider as nutrients and how they're absorbed/interact.

One of the hypotheses for the obesity epidemic is a reduction in essential nutrients, resulting in a lack of satiety.

Understanding of prebiotics, phytonutrients, and ultratrace minerals are relatively new, and we're still learning how different forms of fat have different impacts.

In the meantime, improving existing yields could be really helpful.