If a person is interested in Soylent for sake of saving money, then a similar product that costs more than ordinary food is automatically known not to work.
Hopefully, mass producing Soylent will drive down the price. As of now, it is close, but not cutting it as a total replacement for me. Temporay adoption on the other hand...
Rob Rhinehart's food replacement Soylent now has a crowdfunding campaign.
If you're interested in one or more of these benefits, send in some money! There is also a new blog post.