Display and networking.

Graphics is so much easier to deal with on OS X than Linux it makes me cry. I take my laptop between a 4K monitor on Thunderbolt, a 2560 monitor on HDMI, and a 1920 monitor on DVI. And I don't have to edit a single file on OS X. I shudder with the thought of that on Linux.

Networking just works on incarnations of OS X prior to 10.10. I can pop my laptop open and it pretty much connects anywhere with no configuration changes and only asks when I have to cough up a password. Linux still regularly makes me do wonky command line dances when the interface suddenly disappears or goes down.