I was never a professional photographer, but i have been around cameras and many people that like cameras for 40 years.
I never used one of those cases, and i rarely saw another person use one.
I have watched hundreds if not thousands of videos about 35mm photography and rarely if ever see those cases or hear them discussed.
Are they even made for a Digital SLR.?
What do people use them for, just as protection when they are tossed in the back of a van or taken on a plane.?