Even _they_ don't claim that you'd replace every single meal with Soylent. It's supposed to act as the "default", when you're either too lazy, low on time, or just would rather not deal with preparing or going out to buy a meal. It's a basic meal that can't replace the satisfaction of normal food, but sometimes you just don't care about that. You could consume it as often or as little as you want, and know that you're getting something balanced and healthy at the same time.