In my experience, my surgical colleagues were Apple watch or Seiko types, since they were always removing their watch for handwashing and concerned about loss or damage. Office types (neurology, cardiology, etc.) had more flexibility with their choices.
Mine was gone for almost six months, just for a simple three letter engraving. Two years later, the enamel fill is falling out. No more overhyped Reverso for me.
My Blancpain triple calendar took almost seven months to service and my Leman Timezone is estimated at 26 weeks. In contrast, both JLC and Piaget had a 5-6 week turnaround.