Why all the Leica bashing? Walk over to your bookshelf and pull out a few books by photographers that shot 35mm. You'll find quite a lot that used Leicas. They're great tools that a huge number of very talented photographers have found to be the right camera for their use. These people were not stupid, and they also mostly were far from rich.
What the heck does the "post rangefinder" era have to do with it? This is the post film era. A Nikon F5 is no more up to date today than a Leica M4.
You can use whatever you prefer - Holga, pinhole, or Argus, but it is obnoxious to bash other peoples camera choices.