I think the actual question is somewhere intermediate between those two. (Developers of brainless chickens might not be willing to wait a few years before seeing sales; supermarkets might not be willing to adopt brainless chicken meat widely before seeing evidence that plenty of people would buy it; etc.)
But I think the answer even to your second question is no, for the same reasons I already gave; I don’t think those things will change easily.
I think the actual question is somewhere intermediate between those two. (Developers of brainless chickens might not be willing to wait a few years before seeing sales; supermarkets might not be willing to adopt brainless chicken meat widely before seeing evidence that plenty of people would buy it; etc.)
But I think the answer even to your second question is no, for the same reasons I already gave; I don’t think those things will change easily.