So far enjoying the camera...but...
It's really annoying me that Nikon had to swap the locations of the mode and ISO buttons. I know it started with the D5 and D500, and fundamentally since ISO probably gets changed more often than mode, having it next to the shutter release makes sense.
Still, though, I'm still in D800/D810 mode, and I don't know how many times now I've tried to change the ISO and instead found myself cycling through the shooting modes endlessly.
I had a D500 in the past and I don't remember fighting with it this much, but maybe the similarity between the D850 and D810 is what's throwing me off here. I'm sure I'll get use to it, but I can complain about it in the mean time, and I can see a problem going forward trying to use my other bodies along side it.