There are some interesting points put forward here, but maybe one or two have been overlooked?
Any pro photographer that relies on his equipment as "tools of the trade", will be factoring those into his general overheads, along with both service and replacement costs. It would be foolish to do otherwise, and sensible to allow for the unexpected event that requires either unplanned replacement, or addition to the toolbox. This is one reason why a sitting in a studio is so expensive.
A lot of pros use digital because that is what the customer demands - "forget scanning & origination, just send me the jpegs!". Can you imagine today's sport hack without his digital, and the ability to bluetooth the files via his laptop/PDA/Phone direct to the news desk?
Ok - personal views:-
I don't like SLRs, there are few that I can actually see through due to advanced presbyopia, so I prefer a RF. This does sometimes limit what I can shoot, or the results I get. I am learning to live with this. Coincidentally, just about the only SLR I can use is a Leica, due to its excellent screen (I have tried Canon, Nikon and others)
I don't particularly care for digital - I tried it and was not impressed.
My MP is still worth almost what I paid for it 5 or 6 years ago. When i bought it Don McCullin was in the same shop buying three - his take was that the passport scheme meant those cameras would cost him nothing for the first two years. if he dropped one or ran over it with his jeep, Leica would replace it, and after that he could still get them fixed under warranty.
So, where does this leave me on the Leica debate? Well, I have one MP that I bought new, everything else was bought used - 25mm 'cron, 50mm 'lux and a bunch of LTM stuff. I am not in a position where I could go out tomorrow and buy a new M of any type, or a lens for that matter. Well, OK, I could, but I would have severe problems justifying the expense at the moment.
I do worry that Leica are trying to carve a niche that does not exist. Forget the special editions and a la carte, they are only froth. What Leica need is a core product that people actually need (not want). Many pros need digital due to customer pressure - customers here generally meaning newspapers and other publications, plus ad work; they also need quality and reliability, and I'm not sure that the M8 has that reputation, so it is not hard to see why it is not the first choice tool
Amateurs also want quality and reliability, but at a price point. Sadly the M8 does not score there either, so the great unwashed gravitate to the plastic digithings that they can buy on t'interweb for a fraction of the Leica cost (just try selling one in 18 months though, and you will find it is an entirely sunk cost).
I can't justify Leica pricing, although they are one of the most labour intensive products made today, abd I doubt that anyone here could. I think Keith pointed out that Leica cannot survive on 2nd hand sales of their products, and unless they can pursuade enough of us that we need a new one now and again, they will not survive. They have been close to going under a few times in the past, and financial constraints being what they are today, they will probably go very close again this year.
The point is - how badly do you want/need to own a new one?