How is a monorail "more versatile" than a field camera?

My 4x5 has over 400mm draw. It has more rise than the image circle of my 72mm can cover. It can focus said lens at infinity without a recessed board. It uses Sinar boards and bellows. As such, it can also use have a Sinar shutter system mounted on it. I have had a 3.5kg lens, iris diaphragm and Sinar shutter on it with no issue. And it packs down into a small backpack.

So, please state why this is less versatile than a monorail?