Wow! Amazing in so many ways!
I have been using Nikons since 1971, when I purchase an FTn and 50mm f/1.4 lens. I still use the 50mm with the D850 I have had for close to a month. I have had a D800 since 2013, and a D500 for a little over 1 year, and the D850 surpasses my highest expectations, despite my reading many reviews and evaluations of the D850. I wish I had a second D850 Body! I have used both the D500 and the D800 as backup bodies, with great results, but knowing what the D850 is capable of I know the Upgrade of images/video quality could be substantial with a second D850.