Tinker wrote:
I have a D90 and have enjoyed it for several years. I acquired a Z6 almost a year ago, and have no regrets, since the Z6 produces such a sharp image and has to many features. You didn't mention that as one in which you are interested, but it might be worth a look. If you think you will stay with Nikon you might consider that the Z system will likely be around for some time.
I'm sure that the D850 system will also be around for some time. Some people have the erroneous idea that, just because the Nikon Z, or the Canon R, or any other mirrorless is on the market, that DSLRs will disappear in a couple years... That will not happen.