Anyone, Godfrey, you're right, the capacity of adding a super wide-angle is another advantage. But that comes only by completely ruling out the 5xx body and the related V-system workflow.
In a way, it is like having one of the small and lightweight technical cameras, but with a better price point, nice aesthetics, and AF. But with the lack of shifting capabilities as well.
The V-system is technically discontinued and the only wides it offered that fit on the reflex bodies are the Distagon 40, Distagon 50, and Distagon 65. So you're not going to get "the related V-system workflow" with a wide angle lens on a 33x44 mm format sensor, unless the equivalent of a 30mm lens on FF is what you consider wide. If that's the case, just use the back on your 500 series camera with the appropriate lens.
There's good reason to combine the systems and seek the greatest advantages of both for what you want to do and how you prefer to work. That's why I bought the 21mm lens for the 907x body. I added the 45mm lens because it presents a very versatile and compact option for general shooting, and I'll likely add the 80mm lens for its speed and longer focal length versatility as well. Yes, my workflow will be different (and actually better, in my opinion, because the 907x/CFVII 50c display allows better, more accurate focusing and framing, and much less camera vibration).
If you want a technical camera with swings, tilts, shifts, etc, just buy one and add the capture back du jour you like. I don't see that as a reason, specifically, to want the Hasselblad back, or to complain about it. To me, the whole point was that I already had V system equipment, and the 907x and a couple of lenses brings my system, for my needs, up to date with excellent capture and imaging capabilities.
G