This optimisation is about removing everything except nutrients from food.
Thus he removes taste, texture, price, familiarity, ethical sourcing, halal-ness or kosher-ness, everything except the nutrient.
We know it's a premature optimisation because we already have liquid feeds, and use is restricted to a few niche communities. (Cancer patients; anorexics being force fed; dieters; body builders.) There's nothing stopping you walking into a shop and buying high quality liquid feed today. Very few people do it because it's a lousy way of getting nutrients. People like eating food.
Perhaps I just misunderstand what you mean about optimisation?
The rest of this post is just me ranting, and isn't directed at you, but HN threads about food drive me mental and I need to get this out and my "save to draft" plugin broke (and I haven't fixed it yet) so here it is.
I just have no idea why anyone thinks this guy is doing anything new or exciting.
Some people seem to think that creating a liquid food is neat. It's kind of neat, but he's clearly an idiot and his product is a ham-fisted attempt to recreate something that already exists.
Some people seem to think that living on liquid, and removing the need to eat, is neat. Well, I have a lot more sympathy for that view point because it's about their opinions and feelings and etc. If that's what they want then good on 'em. I'd gently suggest that if they want to try it they're probably better off buying something created in clean labs with known properties, rather than some guy's weird glop.