Many are suggesting that the only reasons being given have to do with saving time but that is far from the case. I spent 2 minutes finding one passage (of many) that discusses 8 or 10 non-efficiency reasons. Yes, they are self-reported. Yes, they need to be verified. Yes, there could be other ways to get there or other factors involved. But these are other, very good reasons being supplied for the exercise.
We're left to wonder exactly what Rob was cooking for himself when he got off the juice. I support Soylent, but I don't believe you necessarily have to feel this way with only access to mostly whole foods.
Whether or not you enjoy cooking is irrelevant, especially if we stand to gain all that Soylent promises. Soylent won't deprive anyone of the option to cook a meal. If anything it may simply add more value to the act of cooking.