There already is a multi $B market for the amino acid methionine, made both through a synthetic process and a fermented process. It's used to supplement animal feed. So it's possible to synthesize nutrition economically. And it's a good idea to focus on animal feed since there's not the ick reaction to humans eating science project food.

I've read lately about another startup Savor that aims to make synthetic fats. They can make it in a variety of forms of it, from cooking oil to something like butter. They claim they can make it both much cheaper and with a much smaller carbon footprint than through conventional agriculture.

https://www.hertzfoundation.org/news/hertz-fellows-tech-comp...