ogl: Who are the buyers of this system...?
I own a Sony RX1, Leica MP, Leica SL and previously owned a lot of Nikon gear. I bought the SL because I can use my M lenses along with the two zooms and I have a very versatile two camera 24 MP kit with very high build quality. Both Leicas are fun to shoot, for different reasons. The cost is not at all prohibitive to me so why would it even be a talking point? If price is your main concern you'd be better off avoiding Leica altogether.
I don't claim the Leicas take better photos than my Nikon kit, though my Summiluxes are better to me than my Nikons at the same focal length were. I don't feel at all foolish for buying my current kit. Do people really need to justify their purchases to others?