I know a photographer (does it for a living) who bought the MkIV when it first came out.
He's shot 2 million pictures with it. Mostly, senior portraiture, with a few weddings, and an occasional corporate function.
He's complaining that his MkIV is showing its age, and he's "pretty sure" he's going to get the new 1DsMkIV when it finally arrives.
I told him if he's all that concerned about his current camera wearing out, he might want to reconsider how he shoots his senior portraits.
He typically shoots 3000 pics of each senior (studio, plus outdoors). At the frame rate of the MkIV, you can imagine that many/most of the shots
are essentially identical (all are shot as RAW files, then processed in LR3, converted to jpgs).
I told him he doesn't need 3000 shots for just one senior portrait session, but there is no telling him anything.
Anybody besides me think that this is nuts?