One big reason is that I just know that I will get a better result from the bigger camera and the slower way of working.
This whole thing about the "slower way of working" is not logical at all.
You can take just as much time and care with a smaller camera.
Just because the limitations of MFD force you to go slower does not mean you can't take your time and shoot
with the same approach with a 35mm DSLR.
I shoot high end celebrity portraits with all formats and there are times when I will shoot with a 35mm DSLR
and take only 5 to 10 shots in the whole session as if I was shooting 8x10 film. I'll even put the 35mm DSLR camera
on a heavy duty column stand.
On this shoot with Larry King I took 12 shots.