You are probably right John about simplicity. But I personally still love the mood in the Picture 2. og 3. anyway. And the Jpegs can't manage a solid B&W conversion at those ISO's.
The GRIV was far more able to deliver weird structure in a pleasent way (for me at least) when staying at the edge of the sensors capacity, even at and actually foremost at jpegs. I miss that strange capacity, looking at the old IV Pictures yesterday.