The whole point of having so little stockpiled inventory is that if there's a reduction in demand or a new product is released, the minimum amount of money is lost unloading the excess product.
Back in the day, Apple would always be sitting on 10 weeks of inventory. When a downturn or new product would come out, it would force them to sell the backlog at a loss, which was very painful for them.
In lost revenues, yes. But that just means less profit. Having inventory on hand and having to sell it at a loss or bury it (like the Lisa, for instance) means actually taking a loss.
Back in the day, Apple would always be sitting on 10 weeks of inventory. When a downturn or new product would come out, it would force them to sell the backlog at a loss, which was very painful for them.