why MF then at all ? is there something in 50mp MF so better for the stated purposes than 42-46-50mp dSLR or dSLM from Sony, Nikon or Canon ? used Sony A7R2 you can have for <= $1500 for example and its Eye AF will still run circles around all MF Fuji, Pentax or Leica...
the files from the 50mpix chip are a very small but noticeable step up from A7RIII and D850.....A7RII, 810 and canon are a little further behind (all for different reasons)...we can argue about sharpness (a lot depends on lenses) and detail , maybe even DR but there is definitely more room for adjustments in post....for 95% of all applications the smaller cameras will be a much better choice...and even for the last 5% the real advantage is debatable....
that does not mean that there is no difference and i simply prefer the files.....
the next 100mpix chips will be better all around and will hopefully help narrow the gap in terms of AF but the A7RIII and D850 will still be a better choice for 95% of applications just because these cameras are so great already......and for me the difference between the existing 50mpix cameras and the future 100 pix models will mostly be what i will be able to do with the files afterwards....better color for post and more room for cropping....better AF would be nice but i fine working with the GFX now, so that is bonus....
there are plenty of raw files available for download from all systems....
there is no magic to any of these systems...so pixel peeping with raws shows what one camera can do over the other.....
optical vs EVF is personal preference.....to me the choice has been clear for a while....
there are situations and applications that have specific needs....the 4shot file from the sony A7RIII is clearly more detailed then one shot from the 50mpix.....so if that is something that might work for one person, the answer is simple and the solution is cheaper.....
for wide open and fast moving people and situations, none of the DMF systems can compete.....and the minor advantages in IQ will completely pointless......