It was kind of unthinkable for me before, but I was looking through LR the other night, and unless I missed something, I've only taken about 2000 shots with my 6D since getting it in early 2013. 3 years, 2000 shots! It's really relegated to a specialty use camera mostly for shooting events. My personal photography has all been with smaller cameras.
I'm considering going full-on Fuji because I really ended up liking the X-T10 more than I thought. I didn't realize how useful that articulating LCD is until actually having it on a body I use a lot, and the AF improvements have really improved the usability of Fuji cameras.
Also, one strength of the 6D and primary reason for keeping it was the high-ISO performance. But I think technique wise I've gotten better at post-processing high-ISO images and using black and white or just being comfortable keeping some grain in images. ISO 6400 is no sweat for my Fuji, especially because the colors hold together extremely well even at that ISO. And with the use of the faster f/1.4 lenses, I think ISO higher than that would be emergency use for me.
That being said my Canon kit is extremely minimal. 6D body and 24-70ii. So another part of me thinks maybe I should keep it around...
As far as what I'd do with the money if I sell, probably not more gear. I MIGHT consider adding an X-T1, but I might also just use the X-T10 primarily and wait until an X-T2 is announced, and then consider picking that up or maybe a cheaper X-T1 at that time.