The D850, in Dx mode, has exactly the same resolution/ pixel pitch as the D500, making the latter redundant for a D850 user.
MF, I always shoot two cameras for Soccer , Events and birds so I can see selling D3S, D7100, D300s and just using Df, D500 and D850 for Nikons. I've been very disappointed with the Sony a7rii for events. AF is no where close to as fast and accurate as my D500 or even the Pen F. I am a bit disappointed in the weight and do wish it would do 9 fps in Dx mode but it does , on paper, look the very best all-round camera available ( and very flexible
) . No price in India yet.