Webvan was an online grocery delivery startup founded in the late 1990s during the dotcom boom. It aimed to revolutionize grocery shopping by allowing customers to order groceries online and have them delivered within a 30-minute window. However, Webvan failed spectacularly despite raising over $1 billion from investors. The company's expectations and predictions were unrealistic, as they overestimated demand and underestimated the challenges and costs of grocery delivery at scale. Webvan also failed to account for how ingrained traditional grocery shopping habits were. This case highlights the risks of ambitious ventures during the dotcom era that were based more on hype than realistic plans and assumptions.