No, not everyone loses their navel. I had the traditional surgery and my scar runs from below my navel to the top of my pubic area; about 5-6 inches in length. My surgeon goes to extra trouble to keep the navel because it can be very emotional for people to lose it. But I do know that everyone has a different physiology which is why no incision lengths vary.
I kept mine, even after many abdominal surgeries, but after a complication and a need for a second surgery within 1 week, it became almost unrecognizable. Then after the next one, I lost it! I am okay with it and when ever someone mentioned something about their bellybutton...piercings and things...I say "I wish I could, but I don't have one!" I will admit that it takes a little getting used to but you can adjust.
Summerstorm--can you pull the skin apart to get wafer tape to stick in it, not over it? The area that should be mine can get red and icky if I am not careful and cover it completely...but if I separate the skin and get the tape to go into it I am okay...just a thought!