An aspect of Soylent that I don't get is the assumption that it gets you out of the drudgery of eating, for those people for whom it is such a chore: the idea of chugging multiple cups of gray, sludgy drink daily sounds like an enormous burden that would grow tiring really quickly. It sounds like something that would make you dread the passing of the day, as another cup of slurry draws ever closer.
I speak at least a bit from experience, as one stage in my life had me working out daily, starting each with a big protein drink. Over time I realized that I was dreading, if not even skipping, the workout because of the protein drink that went with it.