Well, I'm one of those rare individuals who love(d) using these camera cases for my Nikon FE/FE2. I had both the normal snout for my 24mm lens, and a longer snout for my 105mm. Sure, changing film meant taking the bottom of the case off, but I shot 36exp rolls, and I'm not using a motordrive, so that wasn't more than twice a day max, even under the most active shooting days. I used the case like a self-contained camera-bag, and with it on my camera, could either shoulder-carry or just jam it into whatever backpack I was using without worry that my gear would get trashed. When in "active shooter" mode, I would remove the snout and shove it in a pocket or backpack, so didn't suffer from the horror of "dangling". So for me with a mostly one-lens-at-a-time setup, the case worked really well, since I never had a formal camera-bag.
In the modern era, these cases have mostly disappeared, and the aftermarket just produces half-cases. For my Df, I have a really nice half-case with a metal bottom and a door that allows access to the battery/memory-card. I sometimes miss "the snout", but am just using a felt lens bag shoved on the lens when I'm in "jam it in the backpack" mode.