Regarding the OVF vs EVF. One thing I do is dance photography, and have been doing it since the film/manual focus days, which obviously dates me. A dance photographer who has been doing it at a high level for a long time tends to have an innate, muscle-memory type of "built in" timing sense for shooting leaps/jumps/turns, and a lot of that is predicated on seeing things in real time, not in "past tense", and that "seeing things" refers to the internal decision making as to when the shutter must be depressed. In the film era, I had two different internal "memories" to adjust for the lag time difference beween the F3 and the FM2, but the those decisions were based upon real time data, not past tense data. So this is an area where I think - and I don't mean to insult anyone, those who don't shoot it really don't really understand the nuances of it. Regarding the high EVF frame rate, it's a good question and something I'll have to try out assuming I pick up a Z8; my guess is that for some leaps/jumps, that high a frame rate will be adequate for timing purposes, but there are some leaps/jumps that are incredibly time-sensitive with a very, very small window where the shot "is", and for those, I don't think it may be enough. Poster Andre Yew is also a dance photographer and he may have some commentary in this regard since he shoots with a Z9 and probably does more of this type of work now than I do (I still shoot it, but nowhere as much as, say, 10 years ago). I'm not saying the EVF won't be good enough, but I will remain skeptical until I use it myself. The other thing is that while I have adapted quite well to the EVF for many things - more than I thought I would - for studio work with humans, I still like the unadulterated absolutely clear view an OVF gives. As such, I can't say for sure a D850 will ever be totally replaced. But it might be. I'm open to it possibly being so but I also have been around long enough to know that every tool has tasks they are optimum at, so there's that. Long answer for "we will see at some point". So I'm less likely to have absolute "THIS wins period" kind of views than some, but will retain an open mind at the same time.