From what I've seen and read so far I am less and less interested in the new Nikon mirrorless Z series and when the time comes, probably will be going with Sony's A7III and a couple of lenses.... Sony has the advantage for me in that their system is already well-developed, has been through the early days stage already, and there is a nice selection of native and third-party lenses already available. I'm familiar with Sony (and its messy menu) already, having owned and used the NEX-7, the RX100 (several of them, now the RX100 M6), the RX10 M IV and a small P&S.