dct
perpetual amateur
I am sure the elder M mount users know exactly the difference between FF digital (or 135 film) and APS-C. And these users are exactly those with a legacy M lenses park. I too would have to acquire some new lenses if I would go the APS-C way with M mount.I accepted it on the RD1 because it was 12 years ago and Leica didn't have a digital M at the time. Historically (pro) Leica M users have been split between 28/35 and 50mm photographers. The RD1 frameline selector only had those options. So for me it's a negative that a brand new M mount camera is still APSC.
For the newcomers from smartphone I see no problems starting and keeping an APS-C centric M system approach. With Pixii or M mount adapters for the many APS-C brands, or new upcoming solutions. I have to admit that the APS-C solutions are more compact, with less weight and give enough image quality with today's technology. In a nutshell: more solution per $.