I know this is an old-ish thread. I have owned a lot of Fuji cameras: X100, X100s, X-Pro1, X-T1 (actually, I still own them all except for the X100). What I have come to find is that shooting Fuji cameras is about both the experience and the end product. The ergonomics of Fuji cameras is second to none in my opinion. When I want to shoot a picture and not edit it, I reach for one of my Fuji cameras. Fuji glass is amazing.
However, I just purchased a Sony A7RII. Why? The sensor. Based on every review that I've read so far, the dynamic range of the Sony A7RII is nothing short of amazing. Also, ISO performance is another reason for my Sony adoption. The Fuji handles ISOs very well, but there is a limit in my experience. I have long wanted to switch to Sony, but the lack of native lenses at the time deterred me. The lens lineup may not be as mature as Canon or Fuji, but the currently available lenses will fit my needs.
With all of that said, the Sony is not replacing any of my Fuji cameras. In fact, I still have my Canon 5D3. Some people would call me crazy - no, a lot of people would call me crazy. But no camera platform does everything I wanted to. At least not yet. After some time with the Sony, I may sell the Canon. I guess we will just have to see.