Teething problems for digital products are common to all manufacturers. The Hassy H1 had lockup problems, Leaf has a disastrous problem with their current $30,000 back and its got to be at least a 5th gen product, they have been making digital backs as long as anyone. I've always found Apple computers to be very reliable. But the last desktop I got was a lemon, something about the build just never really worked right.
M compatible digital RF has some unique technical problems, so Leicas first effort has some unique compromises. But I have looked at some M8 RAW files, and the image quality is up there with cameras costing similar amounts. Digital is incrediblly expensive compared to the analog stuff it replaced. I paid $8000 for a 1Ds when it was Canon's flagship. A few years before I would have told you you were crazy if you told me I would be laying out that kind of dough for a Canon body (or even if you told me I'd be using a Canon). The 1Ds MKIIs is well over 6,000. despite the fact that you can get the 5D for less then half that. So the current Leica flagship is quite a bit less money then Canon's top of the line offering. I never thought I'd live to see that.
It's understandable if many will pass on being early adopters of Leica digital, it's generally a bad idea to be first in line for any new digital product. But to call the M8 a curio or a joke is nonsense. I've looked at the RAW files from the camera and they speak for themselves. If you want a digital RF that can produce files in the same league as Canon/Nikon's top of the line and are compatible with the entire range of Leica lens going back 50 or more years then the M8 is in a class of one.