Although I'm long-time Mac user, I've also experimented with Linux and open source apps. Recently, I began to compare Debian, Ubuntu and, for a short while, ran them and and Linux Mint alongside my Mac OS. But the more I used Linux Mint (I'm running 9/Fluxbox on my iMac and 10/Julia on my MacBook), the more I liked it and preferred it to Ubuntu. Now, I'm running just Mint with Mac OS. At some point in the future, Linux will be the only OS I'll use.
In short, you folks have put together a beautiful and impressive operating system--well done!
System 76 Pangolin: 4x Intel(R) Core(TM) i5-3230M CPU @ 2.60GHz, Fedora 21 Cinnamon 64-bit
iMac 21.5: Intel Core 2 Duo 3.06 GHz, dual boot Mac OS 10.6.9 and LMDE Cinnamon 64-bit
It's never too late to learn something new.