For me as a heavy linux user. I went to the store and Tried OS X for around 20 minutes. At the time I really wanted a macbook. I actually hated the OS experience. While the hardware is really nice, the software really wasn't up my alley.

I never have the same issues as this guy in Linux. I have been using Ubuntu 100% of the time for years.

Setting up dual monitors in Ubuntu is easy and has been for years. All you need is the drivers from the repo and use nvidia-settings