Soylent has a very high glycemic index, and isn't far off of eating a bowl of sugar. From that angle alone I would categorize it as an extremely poor choice (and indeed this whole discussion is a little surreal -- Soylent would be categorized as garbage, ultra-processed junk food if it didn't have the VC/valley aura around it). I've never bought into the super-food fantasy, because there is utterly nothing qualifying it.
Having said that, most people -- even very busy people with busy lifestyles and a "poor" food diet -- are not nutritionally deprived (and really, a centrum can alleviate concerns with ease).
There are a lot of valid reasons for products like Soylent. Stocking a bunker, for instance. Or for coping when under low energy (depression, as mentioned elsewhere), or in a critical crunch. But that seems to be such a niche that the presentation on here constantly as if this is the future of food seems like fantasy, and would never get a pass if it weren't that it somehow got bound up in the valley/VC bubble. If Oprah came out and started pushing Soylent, it wouldn't get a mention on here beyond derision.
