But the costs are abstract. What if it costs more than $4500 per unit to pay people to catalog, build, and inventory these huge 60kw packs compared to 90kw pack

But the costs are abstract. What if it costs more than $4500 per unit to pay people to catalog, build, and inventory these huge 60kw packs compared to 90kw packs? This is especially likely with how they're probably only making a few dozen of these a year (given the % of the existing packs that fail under warranty) compared to the hundreds of 90s that need replacement every year.