My experience is also mainly urban and highway. Even the mountain roads I sometimes ride are generally very well paved.

Except for regular maintenance (oils, filters, tires, belts), I think the only that was replaced are the rear shocks after 11 years. I can't even remember replacing the brake pads (still plenty left). Regular maintenance is also cheap if you car only take 3.3 liters of engine oil and have massive 14inch rims.