Peter Myers has a wonderful essay titled Enough Already! on the Luminous Landscape website:
When I am out in the field photographing, I enter what for me is a "sacred space." By this, I mean that I do not want to be disturbed in the field by the technology of the camera. Rather, I want to feel free, open to the moment and absorbed by the beauty of the view in front of me. It's not about the camera, but about the moment. Given my feelings, I do not want a computer strapped to the back of my lens, with twenty-plus levels of menus, more buttons than are needed to launch a nuclear missile, and the perpetual pause to monitor that "all systems are GO!"
The Leica M series camera has been in continuous development for FIFTY YEARS -- one camera body and lens system -- the same camera body and lens system.
Over the Leica M's fifty-year lifespan, this camera system has been refined in actual field use by some of the most prestigious names in photography, such Henri Cartier-Bresson, Alfred Eisenstaedt and Sebastiao Salgado. The camera has been slowly and conservatively shaped to create the essence of the minimal requirements of photography, at maximum performance. The camera system simply disappears, and it becomes a link between the photographer and the lens -- the two covalent elements of photography as an art form. "