So true. But Vinnie Tortorich has never changed his original diet. It is still NS, NG No Sugar, No Grains...a plan to support recovery from cancer. It is not Keto, Carnivore, not even Low Carb. As explained: "From NSNG®, you can branch off into Low Carb, Paleo, Keto, LCHF (low carb high fat), IF (Intermittent Fasting), Dairy Free, AIP (autoimmune protocol), Whole30, FODMAPS, KetoCarnivore, or full-on Carnivore, depending on what way of eating works best for your body."
Keto and Carnivore will never be mainstream. As soon as the book was released, The Carnivore MD added fruit, vegetables, honey...might as well add a hot fudge sundae. Just meat and water wasn't going to get him enough clicks to make a living.