Honestly, the economic "it's cheap to sell!" is a pretty superficial trope in most of these articles, and in this case it's probably dead wrong. Kale or chard a

Honestly, the economic "it's cheap to sell!" is a pretty superficial trope in most of these articles, and in this case it's probably dead wrong. Kale or chard are usually much easier to grow and last longer than iceberg. Iceberg won out because our grandparents and great-grandparents considered it a superior ingredient. They grew up in a world where bitter chewy greens were common and iceberg stood out based on their tastes at the time.