Friday Watercooler: My Divorce from Windows

I'd love to get rid of Windows on my final laptop, but to be honest I do need an environment that's representative of what my students are using. I need to verify all my lab instructions and find the quirks they run into. :(
For me, a pristine environment (virtual or physical) that I'd use to validate the student experience, is what I've always done - that way, I can run what I want for how I do my work without having to worry about those things, to me, is the way to go.