> and select the right tradeoff between cost, quality and longevity That's the crux of the matter. What's the "right" tradeoff? With things like waste dispos

> and select the right tradeoff between cost, quality and longevity That's the crux of the matter. What's the "right" tradeoff? With things like waste disposal an externality, often times the "right" tradeoff is one that encourages frequent replacement. At best, this encourages a materialistic (wasteful) culture. At it's most cynical, this is a way of padding corporate profits by encouraging recurring revenue. Don't get me wrong -- this is the rational choice when all incentives are towards maximizing shareholder value. I think the question is what principles do we want guiding the choice of the right tradeoff?