I for one have been known to keep some cameras longer than some cars.

I think it depends on what you do with them.

If your living depends on the camera, you're probably not buying Kodak anyway, since in that case you're buying more into a system, which Kodak doesn't have.

If you're an amateur, it's likely that it will outlive its warranty anyway, so it doesn't make much of a difference. Also, since there's no "system", grabbing a different one isn't that expensive financially.