So... anyone had to pick between the X1D and GFX?
I owned both, and have now returned the GFX after shooting with it for 30 days alongside the X1D. For me, the choice between these two camera systems turned out to be very easy to make, and should be quite obvious to anyone who picks up an X1D and a GFX side-by-side and tries the different lenses. The DNA of both cameras is fundamentally different. The most important thing to me is the form factor. I already have a Hasselblad H2 with a Phase IQ 180 back and a full complement of Hasselblad lenses. I do not look forward to travelling with it. I look forward to hiking with it even less. So, as a more portable alternative to the H2 system, I wanted... a more portable alternative. A medium format system that is small, light, easy to carry, and simple to operate, with minimal knobs, buttons and menu options. That is the X1D. The GFX body is heavier and much bulkier. The lenses are even bulkier. The user interface on the GFX and all of those buttons and dials are a turn off to me. I would forget after three weeks which button and which dial controlled which function, and have to relearn it. OTOH, there are others that love all of that stuff and dislike the minimalism of the X1D.
If the image quality or the lenses with the GFX were superior to the X1D, or if better software options were available for the GFX, my decision may have been different, but that was not the case. There will be endless arguments comparing the color from the two systems, high ISO performance, lens performance at 250% magnification, etc. Everyone will have an opinion, but at the end of the day it's personal and I don't think anyone is going to convince anyone that the X1D is a dog and the the GFX is fabulous, or vice versa. Those opinions are personal and subjective. As it turned out, the one area where I thought the GFX would have an advantage that would have been important to me is the EVF. The GFX EVF has much better specs on paper, but in practice the X1D EVF is actually better. The EVF for the GFX shimmers, which is very distracting to me. More significantly, the magnified live view of the GFX EVF is poorly implemented. Try it with both cameras. The difference is readily apparent. Of all the "features" that a mirrorless camera offers, the single, most important feature to me is the ability to accurately focus the lenses using magnified live view.
Lens lineup? Hasselblad has released 3 lenses so far. A 30mm, a 45mm and a 90mm. They are superb lenses. Four more have been announced. A 120mm Macro, a 65mm, a 22mm and a 35-75mm zoom. I expect that those lenses will also be superb. That's a pretty complete lineup for my needs. Fairly comparable to Fuji's announced lenses for the GFX. I am sure Fuji will fill out its lens lineup with a bunch of other lenses that are f/2 or f/2.8 lenses or zooms and are the size of bazookas. I have zero interest in such lenses.
One other thing. The X1D is the most beautifully designed and enjoyable to operate camera that I have used in over 50 years of photography. It is a joy to use. The GFX is a very workmanlike camera system. It can get the job done. However, there was no particular pleasure in using it. Sort of like the difference between driving a 911 and a minivan. Both will get you from point A to point B, but they are very different experiences.