Doesn't Ensure already exist?
And it's made by Abbott Labs. I don't know how popular Ensure is, but Abbott's baby formulas are literally the only source of nutrition for millions of growing and thriving babies every year.
I would rather buy a product from a real company than from some egotistical young hipsters who (most likely) are nothing more than a recent example of the Dunning-Kruger effect.
And if Soylent goes horribly wrong for them, perhaps the most apropos comment would be: "think of it as evolution in action".