Like unmetered water, an all-you-can-eat buffet, or an unlimited cellphone contract, the new streaming music services create a different set of incentives for both customers and suppliers. To apply these changes to a mature ownership-based market, we have to forget a lot of things we didn’t even realize we had learned. The question we have to ask is not “Should I stream my stuff?” but “How does the existence of streaming services change my job?”.