Well that doesn't bode well ;) Sierra's dock is sooo buggy. I have to restart my machine numerous times a day because the dock stops working, literally doesn't work lol. I'm sure theres a way to restart just the dock app, but eh i've been quite busy. Sierra has been one of the buggiest version of Mac I can remember using.

I would surprised if they actually did tho. I know someone did some static analysis of the apps for mac and iOS and found Swift was barely used at all.