We do free in-home consultations and we often see kitchen doors and drawer fronts that are at the end of the life. They have a ~15 to 22 year life span, depending on usage and maintenance.
Here is a picture of a 17 year old door that is losing it's structural integrity and nearing the end of its life.
You do not need to replace the cabinet boxes and a reface or redoor is a perfect, fast, value added solution.