Adrian, I just love the analogy to building a plane. There is a fair degree of parity for systems complexity if you start outside and work all the way in. Your OpEx comment is spot on. OpEX costs are over 80% of normal data center 3 year TCO, with Cloud very likely to be much higher. If domain expertise already exists and a Cloud initiative aligns with the business' strategic plan, fantastic. But if it would be a force fit, well, your guidance to go the all OpEx route makes huge sense.