I've been in development (primarily PHP, however I've dabbled in C# in the past as well as using a lot of JavaScript recently) for 10 years now. Having worked at a vast range of firms ranging from in house development, agency, self-employed, and that awful stint in IT Support - I've worked on all types of Operating Systems and have a rather eclectic experience range.
It's licensed by Microsoft and has had controlled over the market for as long as I can remember.
If I had a Windows machine, Ubuntu, and MacOS solution in front of me and had to choose one for my projects.
Ubuntu is just too raw for me, and I'm still not 100% comfortable building on it as I'll probably break it!