Search is one of those businesses where just delivering a service that to most consumers seems to not change much from one year to the next actually requires a

Search is one of those businesses where just delivering a service that to most consumers seems to not change much from one year to the next actually requires a lot of work. Actually improving noticebly requires an astonishing amount of work. Improving to the degree that users overcome their brand biases is harder still. I don't envy Microsoft.