And the timing couldn't be better since I got used to switching to Ubuntu (Unity) and Ubuntu is dropping the desktop. I was trying to figure out what I wanted to switch too, and this happens! I'm switching back.
Hopefully this is not a one time thing and we get further updates, but I'll take it. For my deep learning box I'll build I'll drop an Titan Xp in now running macOS instead of Linux.
I've been lurking on this thread for more months than I can remember as well. Was about to go for an RX 580 when it comes out this month - glad I waited!
Regarding the delay in drivers, considering how close the timing was, maybe they had an agreement with Apple to wait until after the new Mac Pro announcement. Maybe Apple thought if pascal drivers had been available, more pro users would have just built a hackintosh or even assumed a new Mac Pro was in the works and held off buying the trash can model? If the drivers are coming out next week then they must have been in the works for a while now, with help from Apple.