Earlier quoted context omitted.
Yosemite was just the push I needed to switch to Linux. I shoved Ubuntu server on my MBP with the i3 windows manager and have never been happier.
Same here. I installed Fedora 21 and dwm as the window manager. I didn't know this computer could be this fast (2010 MacBook Air). The bad thing is the battery duration, which is significantly worse than Mavericks (but approximately the same as Yosemite... I got around 5-6 hours of battery life with Mavericks, 3-4 hours with Yosemite and Linux). I still remember when people were impressed by the speed and smoothness…
This will probably be my last mac hardware purchase... I like the screen and the touchpad so much better than any other laptop, but don't really use it that much, and even then I could have gotten something with similar hardware for half the price... I've thought about installing Ubuntu on it, but haven't taken the plunge just yet... I spend almost 2/3 of my time on my laptop in either a windows or linux vm, so it's kind of a wash.