I'm not saying it's not possible technically. You can. But it's just miserable. Soylent taste bad, it's pricy and you can do same (live on just protein shakes + vitamins) with the other products. It will save you money and supplements like Muscle Milk taste way better than Soylent.

But still I'd rather eat balanced diet than just Soylent or just protein shakes. Personal health is too important to turn myself in lab rat for Soylent CEO.