I’d add that order picking from retail shelves is pretty disruptive to retail customers with any volume. Every trip to the grocery store sees the popular aisle

I’d add that order picking from retail shelves is pretty disruptive to retail customers with any volume. Every trip to the grocery store sees the popular aisle clogged with an employee picking 6 or 12 orders. Meanwhile the in-person customers stack up waiting for the picker to finish. It wouldn’t be so bad except the stores also put all kinds of impulse buy islands into the flow of traffic so that you can’t even transit the block.