Quote Originally Posted by sbjornda View Post
If you're using it as a hand-held press camera, e.g., focusing via a rangefinder or even estimating the focus, you can keep a 120 film back attached and avoid the hassle of loading sheets and you have a much smaller kit to carry. 120 film is pretty convenient to use, compared to sheets. If on the other hand you're always using it like a field or view camera, e.g. on a tripod and focusing via the ground glass, then you may as well use the larger camera.
Roll film is not just (much) more convenient, and less expensive per shot, but it's pretty immune to dust on the film during exposure. Anyone who has ever shot large format knows what a huge advantage that can be (exception - people like Drew with lab grade clean rooms to load holders in!)