Windows 10 is solid, stable and fast. And runs my games, and Lightroom, and... And now, with Linux Subsystem for Windows, also runs the Ubuntu 14.04 userspace quite well. I've setup the dressed-down version of mintty with VcXsrv for the occasional X11 app, and to my surprise it does what it wants. Now, for most of my day-to-day development I either use Tmux or iTerm2 with tiled terminals or IntelliJ, so YMMV, but I'm actually seriously considering to have my next workstation be on Win10.