[WTPayne]

There will always be a need for people who understand the details. Having said that, building demonstrable product quickly is more important in the early days of an enterprise, so developers really need to be able to switch from one to the other; working at a high level of abstraction early on, when you need to move quickly to disrupt and / or capture a market, then move to a lower level of abstraction to optimize and tune the enterprise to make it more efficient within it's niche.