Hi folks - as a longtime D500 user, from my very limited use of the Z50ii at this point, I'm going to say that the camera meets my expectations as a 'D500' replacement. AF is fast and furious, and bird detection mode appears to be working among other AF modes. Focus on eye on bird locks and that's already a winning situation - The D500 didn't have such focus mode detection algorithms so this is a step up by far. The FPS is 1 higher in shooting RAW so that's a bonus. I know many are looking for a true D500 replacement in the Z line, and in many ways the Z50II is delivering more than what a D500 had at the time, and it's as good as it's going to get for now in the Nikon line of APSC for now. For this price point and delivering so much more capability I think this is a bargain!
Hopefully, in the upcoming days in the field will solidify my early claims - sure it doesn't have CF or dual cards, but that doesn't make the camera inferior - using a reputable and fast write SD UHS-II card helps with the write speed to the card minimizing the lack of CF card implementation.