I can tell you that I by far prefer the M 262 by far over any of the offerings by Nikon or Canon and I have been supporting my family with photography 100% for 3 decades now. I only shoot commercial/advertising no weddings or family portraits. I do not deal with the general public. Just finished an annual report shot entirely with Leica M digital. Also shot some 36 X 54 images for a large permanent display in one of my clients locations plus everything I have shot for clients for a bit over a year has been all Leica M.
Light years ahead? In all the bells and whistles maybe but those are things I don't want or need on a camera. I shot with 500C/Ms, large format and Canon F-1s, Nikon F-3s all manual, for a couple of decades and don't need or want most of the things that are so called light years ahead of Leica.
A great camera to me is a light tight box to hold light sensitive material. A lens to focus the image. A shutter to control the time the light is allowed to strike that light sensitive material. An aperture to control the amount of light allowed to strike that light sensitive material. And for me Leica is a design that gets out of my way and lets me create.
My MM is better in low light than a 5DII and in real applications my 262 is as good as a 5DII. That pretty much covers everything I shoot. And my 35 lux FLE was less expensive than my 200 2L and is a lot better glass than my 35L is. I also don't want or need auto focus, FPS, auto exposure and most of the things that are what many others look for in a camera. Nice to have a REAL alternative choice.
So if you like Nikon or Canon rock on. They are great cameras/tools for most but I never liked either of their digital offerings and have no regrets switching to Leica M. I do miss the service of CPS especially with the Itasca location.