Nikon Z8 vs D850: Is the Mirrorless Jump Actually Worth It?

If you're still sitting on a D850 wondering whether the Z8 justifies the spend, the honest answer is: the AF alone makes it a different tool. The D850's 153-point system was class-leading for its era. The Z8's 493 on-sensor phase detection points with -7EV low-light acquisition and subject tracking isn't an incremental upgrade, it's a different category of reliability on unpredictable subjects. For anyone shooting events, sport, or anything that moves without warning, that gap is real and it shows in your keeper rate before lunch.