It is not about persuasion or challenging dogmas, but I have not seen a lot of raw images of MFD especially not comparable images. I like to share the experience, information and results I have.
My take really is that there is a significant advantage of 39 MP MFD over 24MP full frame digital, but I see it mostly as a resolution advantage. Looking at color and DR is another issue. I am pretty sure that my Sony Alpha 99 is more accurate in color rendition (on ColorChecker) but it may be that the P45+ has more pleasant color. Checking DR is complicated by the fact that the histogram on the P45+ is not very reliable while the Alpha 99 is pretty good, so P45+ tends to underexpose about one stop, but you never know. Capture 1 applies a "film curve" as default, so it brightens the image.
If the image is correctly exposed to the right the Alpha 99 given cleaner shadow detail than the P45+. Now, the Alpha 99 may be assisted by lens flare, I normally use it with zoom lenses which have many elements. The Sonnar 150/4 contains 5 elements in three groups while the 70-400/4-5.6 18 elements in 12 groups, many more air to glass surfaces in the latter.
It has been suggested that you rent equipment for a few days, and find out. I had the P45+ for three months now, and I have still not found out.
What I have seen so far is that the P45+ has a resolution advantage with the V-series Hasselblad. That advantage is quite visible under correct pixel peeping condition (resizing to common size and adequate sharpening) but I am not sure it is relevant in prints. Well, if you print large enough and view close enough it will certainly show.
The Hasselblad is fun to shoot but a bit slow. The Sony is more like a tool that does the job. More often than not I make just one exposure with the Sony, thanks live view and excellent exposure metering. I really mostly shoot from tripod, by the way.
Erik, I think you are risking the fate of the guy who overheard medieval scholastic philosophers' attempts to determine, theoretically of course, the number of teeth in a horse, and dared to suggest to just open the horse's mouth and count. They beat the crap out of him for being so unsophisticated. Challenging dogmas with empirical results is always a risky proposition