I'm not, in that at work I use a Mac. I write Java server code for web servers and batch data-analysis, deployed on Linux boxes. A significant portion of my time is spent either ssh'ed into a Linux machine, or using the various Unix utilities as well as git and mvn in the terminal.
My point, perhaps poorly stated, was this: I prefer a terminal-heavy development environment because that is the most efficient way of interacting with remote servers for the work that I do. I can't consider using Windows without a sense that they've made it a priority to address my use cases and scenarios, and the single lowest hanging fruit possible in that regard is to spend half a dev team (2-3 devs) on modernizing the terminal to the point where when I'm at home and want to check something on a server, I use my Windows desktop instead of switching to my Mac laptop. Even better would be dedicating one or two dev teams to supporting a Unix environment natively, so Cygwin isn't necessary.
For what it's worth, I much prefer the Windows GUI to either Mac or Linux. I was a test developer at Microsoft for Windows 7 and part of 8, and I wrote this comment on my home PC running Win7. I would like to be able to use Windows for the UI and the familiarity I have with it, but those two things, a good terminal and a Unix-like environment, are requirements for my job. And I know from experience that this scenario is absolutely the furthest thing from the minds of the people working on Windows.
Most developers don't have a choice in the supported platforms of the product they work on. If your product targets Windows (and it will if the customers demand it), you don't have much choice!
