Part of the problem is the risk. It seems to be impossible to get viable insurance for expensive camera gear (Spain). Several times I have found myself shooting in riots where people were throwing acrylic paint, and in one case molotov cocktails. Recently I was shooting at night and witnessed a woman being mugged by three men. There was nothing that I could do - the men got away with her necklace, although fortunately she was otherwise physically unharmed. After that I have been very wary about shooting alone at night with expensive equipment.
But beyond that there is still something about shooting film that is not captured with digital. I do not know if it is the limitations of the cameras/medium, the process, or just my own internal biases. Perhaps digital just seems too easy or too ubiquitous. Or perhaps the limitations and quirks of Leica rangefinders only really make sense in the context of a film body where those limitations and quirks are inherent.
That said, I am in the market for a higher resolution digital body and have been considering jumping (digital) ship for a few months now. As I shoot almost entirely in B&W, maybe the M10M will be an alternative.