Iff it tastes good and it’s cheap enough...
Actually, “meat replacement” plant based foods have been around quite a while, I recall that some thirty years ago, or maybe more, a sort of “hamburger extender” was available, to be mixed with ground beef, to make a lower-cost substitute. These mix-in ingredients seem to have disappeared, though there a lot of things like plant-based “bacon” chips, and of course, tofu, a soybean curd that was supposed to be “cheese”.
Then there was supposed to be a sort of pink slime, grown from cultured beef muscle tissue, but NOBODY is seriously going to eat it in that form.
Soybean oil meal, high-lysine corn meal, and various parts of of wheat germ are also used for a “balanced” protein mix, but these ingredients do not actually provide the same balance as a naturally grown meat product, be it chicken, turkey, beef, pork, mutton or even “cheval”, horsemeat.
I would not choose to determine if “Soylent Green” was of equal food value.