However, they big challenge they will eventually face is the existing nutritional product manufacturers. At the moment, Soylent is not viewed as a serious competitor, but it is worth remembering that if they prove that a market exists, Abbott, Nestlé and the like both have the marketing clout and some rather clever tricks to muscle in on the market.
But the saddest thing of all? Despite companies like Soylent, Abbott, Nutriset, Nestlé, etc, clinical malnutrition is still a serious issue. Proper nutrition is essential to successful treatment to many issues (cancer being one), yet it is still commonly neglected by clinical staff and administrators :( And most people don't even know about the risks and that different options exist for different needs!
(Disclaimer: family work in the industry)