I quit looking at discussions about Nikon mirrorless a few months after my Z6. it did take me a while to figurethe systems out, and firmware updates helped, but I love my Z6. The Z8 is amazing. I am happy.
My experience has Sony folks and those who switched because of th Z6 was not a D500 have a vested interest in supporting their decision. The part I like is the continuous improvement of each Z body. They Z6 met my needs once I got comfortable.The Z8 has been amazing.
Bui can only share how I feel about the platform. I am glad I stuck with Nikon and the Z8 convinced to invest in new glass.