I'd be interested in MBP sales figures from the batch of MacBooks with the new keyboard/touch bar. From my perspective, despite a whole host of issues, very few people seem to have actually moved away from Mac's. I hear a lot of grumbling, but you only need to look at this thread to see people claim that the MBP is the best professional-grade laptop available today, when the issues with the OS, the keyboard, and the…
I stick with it because, in only my very subjective and personal view, there's no other OS available that is as streamlined as Mac OS. I try all modern offerings just about once a year, and have yet to find anything better for myself. It's their one saving grace in my view.
In my case, I think it's definitely the latter. For Ruby dev I could switch to Debian tomorrow and probably be fine, especially since most of the stuff I work on from day to day uses Docker. That won't stop my workplace from buying MBP's, though..