. I am a former Sony mirrorless user documenting the many ways that my D810 beats the Sony A7r.
Maybe you're thinking of making a change to the easy breezy Sony. Read my blog before you do.
I am using some of the best lenses in the world (Zeiss Otus 55 and 85 and the Apo-Sonnar 135) to show the superiority of Nikon.
Additionally, while they fall short of the Zeiss mentioned above the Nikon's AF and AF lenses can be twice as good as the Sony equivalent. (Except the FE55 which is a pretty darn good lens (even on the Sony). https://sonyvnikon.wordpress.com/