Hmm, this situation is like owning an electric vehicle. The manufacturers are passionate about technology, and they invented a flywheel that can store massive amounts of energy, giving your vehicle incredible transient acceleration response. They ship many vehicles with this new feature, but unfortunately, they forgot to account for what this would do to the battery charge display after starting. As a result, their reps keep on having to explain that the vehicles are not rapidly leaking charge shortly after starting -- instead that energy is being placed in the flywheel where it can greatly increase the car's responsiveness.

Whoops!

The difference between the scenario above and Linux's disk cache? Techies blame the former on the car company but the latter on the end-users.