Connie, are you dumping Apple for Windows soon?
NO WAY!!!!! I dumped Windows for Apple back in 2005 and have no interest in switching back.
I had been wrestling with this decision for a long time, and really wanted to be sure that I was doing the right thing. It made it a little easier that I was already familiar with Sony cameras, having used the RX100 (several models) and the RX10 M4, plus the camera which introduced me to Sony and to mirrorless cameras in the first place, the NEX-7. Y'all can blame Rich Gibson for this -- one day he came over for some reason and brought along the NEX-7 that he had just bought a week or two before, and once I handled it was fascinated by it. The focus peaking and other features really were intriguing. A week later after having done some online research I had my very own NEX-7 and a couple of lenses. I've loved that camera for a long time.
Another thing which made this decision easier was that I really love shooting macro and was quite disappointed when it became evident that a macro lens or two was not on Nikon's roadmap for the foreseeable future. I really dislike using adapters and was uncertain about how well some of my older macro lenses would do on a new camera anyway. I was watching and waiting, watching and waiting, and at some point started to get a bit itchy to finally just get going and do something. I also realized that I wanted to simplify things a bit and to be using just one system, plus I also took the time to really think about what I like to shoot and what lenses would be most appropriate. I really didn't need fourteen or more lenses, many of them sitting around in the Pelican cases unused; now they'll be going to new homes and new users who will give them new life.
It'll probably take a few days or longer to get up to speed with this new gear, but it'll be fun as well as challenging.