I got terrific use out of my M8 for the first couple of years of ownership, but time marches on. I'm in China this summer, completing a book project about Shanghai, and I brought my old Konica Hexar RF to use with Leica-mount glass, and my Rolleiflex. The M8 stayed home. When I shoot digital here, I'm using a Canon 5D Mk II, with vintage glass from other manufacturers and adapters. The files are incredible, and the form factor, given that they are manual focus, fixed length lenses, is not at all obtrusive.
We all know the M8's quirks. What kept it on the shelf for me among numerous other issues are the noise above 640, the frame line problems.