When Zeiss rangefinder was introduced, I tried it. OK the finder was nice and also the film loading. I could not , however escape the feeling that it felt about the same as canon rangefinders, they were also "OK"" but lacked something vital. The feel was somehow "flimsy" like a toy camera. I have a feeling that a serious camera must have some "weight", some "presence".
leica has it, all the way from M3 in 1954, you cannot argue on that. same applies to Bessas, the feeling these cameras is not "serious"...
I certainly can argue on that. The "feeling" is just that - a feeling. There's absolutely nothing objective about that. Feelings vary from person to person. And they really have nothing to do with taking good photographs.
I'm glad that a Leica camera works for you. I hope that the $5000 price tag works for you too.
Fact is that the Zeiss Ikon is a superb photographic instrument - objectively better than a Leica M6 or M7 in some ways, i. e. longer effective base line; larger, brighter finder with no flare and less clutter; shorter travel distance for the shutter release button, resulting in quicker response.
With the digital revolution resulting in many smaller, lighter cameras, I'm surprised that we're still talking about the heft of a Leica as an important factor since we've adapted to these smaller, lighter cameras. At this point, even my small Olympus Pen in 4/3 format seems big compared to a lot of what's out there.
It seems to me that what's important about a camera is that it is balanced with all of the components working well together. For example, the shutter release button ona Leica M has to trave 2 mm to activate the shutter. This requires some pressure and the weight of the camera creates just the right balance. In contrast, the shutter release button on the ZI has to travel only 0.3 mm and can be activated with a lighter touch. This too works well with the lighter weight of the ZI. It feels just right.
Obviously a Leica M is a superb photographic instrument, better than a ZI in some ways and superb in its own right.
Te demise of the ZI has to do with the demise of film photography in general. I don't really see it as a reflection on the camera nor an indication that something is lacking in it.