For an individual session, the cost is certainly small. But in aggregate it adds up. I don't think the cost is large, and I agree that given the tradeoff, the

For an individual session, the cost is certainly small. But in aggregate it adds up. I don't think the cost is large, and I agree that given the tradeoff, the cost is probably worth it, but there is a cost, and I'm not sure it can be categorized as "almost nothing".