The Leica M10-D is essentially an analog camera with a digital sensor. There is no viewing screen and the camera was designed to be the same size as the Leica M6 film camera. There is even a winding lever on the camera. It doesn’t cock the shutter though. Its only function is to act as a thumb rest for photographers used to using the wind lever as a thumb rest on their film Leicas.
It was initally hard for me to switch to digital. I had carried an M6 around for so many years the larger digital Leicas didn’t feel right. I also didn’t like having a screen on my camera. Even if I didn’t look at it, I knew I could and that was a distraction. Suddenly I have to trust myself again, and that feels good.
That being said, I have a regular M10 with a screen. I don’t feel too bad about it. In the past I did use polaroids when I just had to know for sure.