Don't feel too bad, I'm *almost* done getting all my servers off 2008R2 to 2014.
I had someone ask me yesterday when we'd be going to 2017, my answer was "only when someone comes to me and says there's this really neat new feature in 2017 that we just HAVE to have!"
Then it'll probably still be 6-9 months just to get the server stood up and installed, another several months (or more) to get SSMS17 approved for use on our network, plus a couple months for the desktop people to figure out how to install it, get that approved and tested...