Well to each their own. I can certainly imagine times when it's a good thing. And it's not a BAD thing in my Mamiya because I have the interchangeable backs. It's really in 35mm where I find 36 quite annoying because I seem to frequently have the "wrong" film still in the body. The answer, of course, is multiple bodies. I have an LX and an MX. My K1000 seemed to drop some foam or something right on the microprism spot and I need to get it cleaned at least before I can use it. I have more backs for my 645 than functioning 35mm bodies right now.
The "pressure to make every shot count" is one of the best quality-increasing factors in photography. I think everyone should go out occasionally with one roll of 120 or, better yet, a view camera and about six sheets of film. Frame a lot, trip the shutter on a few and really look first.