Not really. You are comparing the Leica M with the most expensive Canikon, not the technically comparable, like the $1500 Nikon D750. I think you are better off sticking with your argument that, regardless of cost, the Leica M fits your vision and the way you work.
No because technology doesn't = better. Top of the line would be just as fair a comparison now as it was in the late 1970s. I would argue that the Canon F-1 or the Nikon F-3 are far superior cameras to what Nicanon produce today and were less than half the price of Leica M at that time. I had DSLRs for a decade and hated all the crap that was on them. Complicated menus and stuff that has nothing to do with making good photographs and more to do with having the latest and SO CALLED greatest.
I also owned Hasselblad 500 C/Ms and they were a lot more expensive than top of the line SLRs and most other medium format systems at the time.
This technology further separates the photographer from the process thus making it easier for someone without technical skills to make technically average photographs under average conditions. Many good photographers do not want to be separated and still want the control. We should all be glad there is still an option like that available.
All that stuff on my so called advanced DSLRs got in the way of me creating. The camera companies like car companies have convinced the public that the more stuff on a camera, like a car, the better value it now becomes. And because of new technology changing if you don't stay on the gadget go round you are somehow less or have become out dated and need to upgrade ever year or two. This is in Nicanons best interest to see folks upgrading ever two or three years. With the way cameras have been for the last 5 or so years they are all perfect capable.
As Ernst Haas once said " The camera doesn't make a bit of difference. All of them can record what you are seeing. But, you have to SEE."
And a great quote by Edward Weston and is jsut as true today as it was when he said it well over 60 years ago. "The fact is that relatively few photographers ever master their medium. Instead they allow the medium to master them and go on an endless squirrel cage chase from new lens to new paper to new developer to new gadget, never staying with one piece of equipment long enough to learn its full capacities, becoming lost in a maze of technical information that is of little or no use since they don't know what to do with it."
All the digital cameras around now and ones that have been around for a few years now are all perfectly capable.