For every little add on that you want--- Auto-focus, Auto-Exposure, Auto-photographer, you have to add in a bit of failure possibility. With LESS electronics or mechanics, the possibility of the camera working right the first time and every time goes up.
I shoot on a daily basis with two cameras, each over 65 years old. One has had an extensive CLA and the other has had a cursory air blow out every year or so. Neither has foam to deal with, neither has a very complex transport mechanism. While they are Medium format, I think that the idea is translatable. And yes, both cameras work right all the time and every time.
I have used both for news stringer work, and within the last 2 months had a scanned image in the local paper of a body being pulled out of a lake. My pix scanned from chrome film were way beyond what the paper had, and I was able to get closer with a simple folding MF camera rather than lugging 30 pounds of digital camera and lenses and bags.
Less technology ---> works longer and easier to maintain
More technology ---> greater chance of failure and more difficult to maintain