You have to chew rice and beans. It's still easier and faster to gulp down some slop.
Given how bad the hype has become (Soylent appears to me to be about as useful and likely to be successful as Pets.com), I think it's time to start shoring a bunch of Silicon Valley stock; we appear to have hit the next bubble. The problem is that outside of Twitter and Facebook, no one has really gone public recently, so it's a lot harder to actually short these silly companies.
I've tried supplements and eating very dense foods (lots of grease and carbs) with lukewarm results but if Soylent works as promised, it'll basically change my life.
That said, my comment was meant to be humourous and I totally understand how people who don't have problems with normal food might view Soylent. It's the ultimate first-world problem.
I know of Ensure Plus because I know lots of people with anorexia, and it's used during refeeding programs. (Sometimes as a drink, and sometimes through an NG tube).
Sure, there may be some people in specialized circumstances that have problems with normal food, though there are a lot of options already (smoothies, existing meal replacements like Ensure, possibly even bodybuilding focused meal replacements as they tend to focus on being high-calorie, soups, etc). And yeah, Soylent does seem like the ultimate first-world-problem food.
Anyhow, good luck with trying to get more calories in your diet, and if Soylent helps you with that, all the better!