Yes, the trend for the last years hasn't been great. With Apple's current market share, it sometimes feels like the unix core is more of an historical artifact

Yes, the trend for the last years hasn't been great. With Apple's current market share, it sometimes feels like the unix core is more of an historical artifact, or one of the bullet point in commercial presentations. I don't see them put much efforts in pushing Darwin forward when they could use the same resources for Bridge OS or other parts they see as a differentiating factor. On the bright side, Mac OX coming to enterprise settings also opened the door for linux laptops, and they became a truly viable alternative. Perhaps linux getting better representation and commercial foothold could help keep Darwin competitive and properly evolving, one could hope.