The other thing about the mirrorless revolution is that is easy to forgot there’s no reason to switch if you don’t want to as long as the size/weight of a dSLR doesn’t bother you. The Df and D810 are still fine cameras, and there are plenty of enticing f-system lenses out there for which there are no true native mirrorless equivalents (105 f1.4, 200mm f2, for example - excluding the sigma 105 1.4 FE-Mount because it’s a monstrosity and not designed for mirrorless). My wife has hinted she’d rather be shooting with a D8xx than a Fuji X, so I’ll be looking for another D810 at some point, which I’ll buy second hand cheaper than a Z6 or Z7. Plus, with everyone switching to mirrorless, there are plenty of good deals on second-hand F-system bodies and lenses aroundWell, it's not for me. I'll struggle along with the D810 and really not think that I missed a significant upgrade. When I saw the adapter for the F lenses I thought of the Hasselblad X1D adapter for the H lenses - both ungainly and defeating the purpose of the body. IMO, if you want a Z7, you need the native lenses to take advantage of the concept. Which, is in essence, a changeover to an entirely new system. Perhaps I'm a dinosaur with the F system, but so be it.
The X1D was more interesting to me, but two things put me off - still don't like/trust EVF's and second, I contacted a Hasselblad dealer about trading in my CFV-50c on an X1D and all I got was an "I'll get back to you..." Which never happened.
My next new camera body has not broken ground. Yet. And hell, at my age I'll probably be able to shoot and enjoy the D810 and Df until I croak.
I definitely agree about the lenses for the Z system. I think the Z system (and Canon EOS R) will hit its stride/potential when the native lens lineup fills out (and possibly when the gen 2 bodies arrive). If a Z is ever in the cards for me, it will be at that point a few years from now.
Regarding the X1D, there was never a trade in program through Hasselblad, so it would’ve had to be through your dealer. I looked into trading my H4D-40 in this manner, and ultimately purchased the X1D outright. I still wish I could’ve bought your CFV-50c for my STC though