It's funny, a lot of Apple's networking code is cribbed straight from the notoriously wonderful OpenBSD codebase. How did they manage to screw that up?
Has there ever been a time period where a BSD was known for having a notably better WiFi stack than Linux? I know the BSDs have a great reputation for their network stack overall and in particular the utilities for configuration (especially if you are willing to ignore the missing features), but I've never had the impression that there was any advantage specifically with regards to wireless. I seem to recall the BSDs historically having much narrower driver support and being years behind on features like 802.11ac.
OpenBSD was/is notorious for having terrible wireless drivers, but decent networking capabilities overall. You're right that the WiFi stack was never really any better than Linux, but BSD networking has long been a choice for high-traffic servers.
