True dat. I just shot parts of the Long Beach Grand Prix with an RZ. Wasn't easy, but I got great stuff that won't look like anyone else's work!
There is something to be said from getting away from the traditional.
A friend of mine who is one of (if not the) premier architectural photographers in the world, sent me an amazing image shot with a Panasonic Lumix. Obviously this is not his standard medium format style, but the image is beautiful and no viewer cares about the camera, the lens, or the pixel count, they just see that beautiful image.
In fact I have been on to this photographer for years to shoot a fashion spread and he just looks at me like I'm crazy, but I can see the fluid design of how he uses light, shadow and subject to create an image and I am positive would translate into a beautiful fashion spread.
Sometimes on set, if I feel like I'm getting flat footed or stuck I will purposely use the wrong camera, if only for a few frames. It just opens my mind, and makes me see the goodness of what's in front of the lens in an entirely different way.
True, to some extend we all specialize, but I am not a believer that if you shoot cars you can't capture a beautiful scenic, or portrait. It might be different from the norm, but that's what photography is about melding the personalities of phtoographer, subject and sometimes (actually in my world more than sometimes), the talents for the support crew.