So I don't really understand, but I'm not going to force my tastes on others.
Enjoyment of food can be a social, entertaining, and ceremonial activity. But eating as in 'consuming food for nutrients' is a biological necessity. Thus they are completely separate goals. There's no reason a singular activity should be forced to perform two completely unrelated goals.
If you want nutrients flavor doesn't matter. If you want flavor nutrients don't matter. You could choose what you want, when you want, and do it as efficiently and cheaply as possible.
The only appeal for me would be removing the time constraints of cooking or dining out. To be honest, cooking is a huge time sink and dining out isn't a whole lot better.
Which is fine; there's nothing inherently wrong with being lazy or ignorant about cooking. But evangelism about Soylent freeing up ones time is silly, all things considered. It's not for everyone, it's not for families, it's not even formulated for women, the elderly, children, or generally for people with nutritional needs that deviate from those of a 30 year old male. It's for the lazy dude who doesn't want to cook.
I love to cook, and there's just something about the crunch of roasted veggies, the savory taste of grilled meats, and the warmth of a good stew or soup that I had to have. Call it a "first world problem", but living on sludge, even good tasting sludge, isn't truly living for me.
Of course, at 37 years old I'm overweight, diabetic, and at risk of heart disease so I have to do something. I've already started on my goal to be a healthy weight and have my blood sugar, blood pressure, and cholesterol under control without medication by the end of the year. First step: Halve my caloric intake, not by starving myself but simply by reducing portion sizes. I don't have to fill my plate to get enough calories for the day; half a plate gives me enough energy and nutrients in a meal. Step two is walking at least a mile a day, gradually upgrading that to 2 miles, then jogging 2 miles a day once I've dropped enough weight that my knees won't suffer.
If I make it to my weight and health goals by the end of the year, I'll start working on building up some muscle to help keep the fat at bay at my sedentary job. It sucks being not quite 40 and feeling a bit over 60. Hell, my dad is in far better shape than I am!