They really are. I've toured four different RV plants and they all had real assembly lines that operate on a fixed time schedule. You better finish your task in the time allotted, cause that RV is moving on! But they move in discrete steps, not continuously like an auto maker line. And they do complete tasks, like installing all water lines or installing cabinets. Not just tightening 4 bolts on the left front fender.
2004 American Tradition; 2014 Buick LaCRosse
Homebase in the Ocala Nat'l Forest near Ocala, FL