well, yes and no. The present M8 is not keeping me from taking the kind of shots I like to take with it. It is very capable. It still has some shortcomings that would make it even more capable for greater use. (Nothing more aggravating than taking a great shot with a Noctilux wide open only to have flare from the damn UV/IR filter ruin things. The lens delivers. The sensor captures things nicely, but the other "little things" make for headaches. I still chafe at having to put filters on all that great glass. I do not use filters on any of my other lenses, and never have any problems.)
As a person that struggles to make my living at this photography stuff, there is nothing in the Leica line-up that can accommodate a large portion of my working needs. (I shoot equestrian and professional polo where distances and speed/action and dust dwarf what the M8 can do, save for one or two good frames every now and then.) Nothing to handle big lenses, having good autofocus, shoot at higher frame rates and under more difficult conditions, etc. The lack of a capable DSLR at this point sort of forces me to use other gear. Leica has not given me a choice in their offerings. They had one, but it is gone. They hint at a possible successor, but no idea what and when.
So, as I commented before....the M8 does a great job for what I can use it for, and much of that work is less demanding, is more creative, allows for getting into that sort of shooting mood and style to get those shots. I love it. It does not, however, offer more of the features and capabilities that other cameras do for harder, more demanding professional use for me. I can live with that, and am using it for shooting more things all the time. It is not holding me back....yet. I have not taken it out an high-pressure assignments yet, simply because I do not think I will be able to bring back the results that I need. Whether that is from my inability to use it, or its inability to keep up with me creates the same result. If I absolutely need to get the shot, I reach for one of my Canons. Period. I really would love to be reaching for a Leica DSLR that could deliver the same way, but that is not possible now, and it is questionable going forward. Those may not be everybody or anybody else's needs, and I respect that. I just feel that for the money, time, effort and frustration spent, the Leica today is more for the serious hobbyist and artistic pro, and not so much for the working pro that needs more reliability and support. Since many photogs dabble in all areas, it is not unreasonable to want both. Unfortunately, Leica is only able to address part of the wider ranging needs/wants right now, and is not offering an awful lot of future vision to address the other options. When I shot with Leicas for PJ work using film, they always could be counted on, and there were times I much preferred them over my then Nikon F series cameras. Digital changed that a lot, and Leica is not keeping up at this point, so all those performance things do start to matter. Just my thoughts an opinions.
LJ