Re your last point: The article focuses on lettuce, but I'd associated these vertical farms with microgreens. I've never eaten one, but my understanding was the

Re your last point: The article focuses on lettuce, but I'd associated these vertical farms with microgreens. I've never eaten one, but my understanding was the intent is to sell microgreens to high end restaurants at a high price, as you said. Otherwise, the lighting costs (compared to the sun) would make these unviable.