LOL. No, you can disagree. I love intelligent and humorous banter.
Ok, here is my text summary, with images to follow, once I have sorted the 100GB of files I took on this exercise. And this describes one of the unavoidable side effects of shooting 200MB raw files. This will eat up your storage and what's worse is the space in your DAM. My recommendation is that you get to be diligent and ruthless when culling. Convert to JPG (or just KEEP the JPG) for the majority and then keep RAW files for the specials. I do have about 90TB of space however, so not a big problem for me.
Re the camera: I was using a GFX100S, not the latest GFX100ii. Never the less it sports a really useful IBIS and good AF, which is accurate if not the fastest on the planet. I realise that the GFX100ii will out perform the one I had, and I think if I did decide to join the G brigade, I would probably go to that one.
Size: I had absolutely no problems with size, but then I wasn't taking this hiking up the Himalayas. I loved the larger LCD and viewfinder.
DOF: I was expecting a narrower DOF than the XF, but I was still amazed that even at f16 landscapes were not totally in focus. This means that one has to shoot f22 or f32, which slows down the shutter speed and also makes me wonder why I would spend huge $$ for f1.7 lenses!
Lenses: I had 2 primes and 2 zooms to play with. Other than physical size, I could not detect any noticeable image IQ difference. For portraiture I was shooting f4 or f5.6 anyway.
Image IQ: Of course this is where the rubber hits the road, isn't? The GFX certainly does deliver. What was really funny though, was that I shot very similar pics on my X-H2 and had them in the same folder on my drive. On more than one occasion, I would open a subtropical rain forest shot or a portrait, and think, vow medium format is brilliant - only to discover that I was looking at a shot from the X-H2! This is not to say that the GFX isn't even better, but it is to say that the X-H2 is outstanding, when used correctly. The G shots excelled in not blowing out the hightlights or clipping the blacks, and the colours in 16 bit are just unparalleled. The H2 however, not only saves a motza in drinking vouchers, but is MUCH faster focussing (birds in flight, anyone?) and you can shoot wide apertures to get similar results.
Conclusion: It's a win-win choice. If the wallet can fund a GFX system in addition to an FX system, then you won't be disappointed, but for now, I am very happy having an X-H2 and an X-H2S and my 19 lenses. The REAL BAD NEWS is that my friend bought the GFX100ii and 2 lenses, but he is lusting after a Hasselblad (foolish person) and had threatened to offer me his 1 month old GFX kit at a good price! Please send donation to my PayPal account, so that I can do a long term review!