Nikon kills loyalty by using software to remove features their hardware platforms are capable of performing; my personal experience with this was finding out that my d-500 could not do some of the things my d-850 could do when the only real difference was the physical size of the sensor- and the price point. I needed a lighter camera for field work, which is why I bought the d-500 to start with- only to discover Nikon had crippled it so it wouldn't compete with the D-850. I learned my lesson. I sold my 3 Nikon bodies and 8 Nikon lenses and bought Canon equipment, and I can't imagine ever buying again from a company that literally breaks its own products to protect its profits.
I hope this is wrong and we do see the update in the Z8. I have asked the question to Nikon hopefully many Z8 owners will do the same in the meantime lets see what Nikon come back with