because of leaks and maybe it's harder to drive because it's top heavy? I wanted to get one because I thought with the overhead cab (like Airstream B190 or Coachman) you could have more room to move around in and wondered why they stop making them, maybe I thought for style. Then I read stories on RV forums about leaks, even read a blog of people who restored a Toyota Sunrader and tipping over (so maybe on a small vehicle it's too top heavy) and then maybe people don't like the overhang blocking some of the view (and those that do buy a Class C) !