I just checked the label of my freshwater guppies' favourite food: sure enough, it's pure fly larvae. It was so shocking to me how voracious they were for the tiny grains of ground larvae compared to the typical fish/grain meal flake food. It was touched on in the article: it's not very cheap yet. But it's abundantly clear to me that this type of highly efficient nutrient transfer is going to change the agricultural food chain forever.