If you are for a long time at the top you've basically achieved everything you wanted to. Then the ball's breaking stuff starts to be too much: it's not what you do in the car, it's what you do outside the car - the press conferences, the interviews, the sponsorship commitments, the marketing appearances - that sadly go up to a level that the whole package, including the risks you take, the workload you do to get the car to work and for you to be quick in the races, it becomes too much.