Finkelstein, in this example, as in many others, showed the difference between "great expectations" and outcome.
"Even today, writing about Webvan, it's easy to get excited by the vision. But the business model was fatally flawed from the start.
The supermarket business is notoriously low-margin to start with, so where was the money goint to come from. ... Throw in free home delivery, and you've got to become the Superman of productivity to make a profit. ... When you add up the costs of building the Webvan infrastructure - easily $1 billion plus -- it's hard to see how the numbers can add up. Now imagine that there are literally tens of thousands of competitors - call them supermarkets - that can easily add home delivery, that do not need to spend millions (let alone billions) to do so, that already have customers and market presence, that offer products of essentailly equal quality to your own, and are - surprise! - not really dinosaurs after all, and you have an idea that is getting less good with each passing minute.