Plant meat is over 100 years old. Beyond and Impossible were trying to reinvent the wheel. I've been eating Morningstar Farms and other meat substitutes for 40 years. Choplets, which you can still buy, became popular during WW2 because of meat rationing but they were far from the earliest meat substitute. The same man for whom Kellogg's cereal is named also formed the Battle Creek Food Company which made meat substitutes - the best known being Protose which was made from wheat gluten, peanuts, and soy.