Energy density indirectly matters in utility scale applications, since it implies the cost is more dependent on raw materials and therefore it limits how low th

Energy density indirectly matters in utility scale applications, since it implies the cost is more dependent on raw materials and therefore it limits how low the cost of production can get. In contrast if the raw materials are dirt-cheap per watt-hour (because you don't require as much mass) but the manufacturing process is expensive, then over time the manufacturing process can generally be made cheaper and you can expect the batter to get cheaper quicker.