Cool story.
Why I use Windows 7?
I do taxes. I play 3D games. I do coding. I do a lot of scientific analysis and modeling for work. I do a lot of instrumentation control and driver manipulations during work for which I use specialized software like LabView and MATLAB and OriginPro.
Which is the operating system that allows me to do all of those things, without compromise ? You guessed it Windows 7.
How much does this cost me? Maybe a couple of thousand dollars including all the Windows and specialized software licenses, and zero time. How much will it cost me in time and money to replicate OriginPro on Linux or develop a peice of software that performs all those things on Linux?
The oh-so dangerous viruses that supposedly arrive through emails are taken care of by three things.
1. Get MS Security Essentials. Leave it on autoupdate.
2. Don't ever overrride its warning unless you confirm the file is non-executable/safe manually.
That's the thing with Linux...if I need it, I could get it an no cost. It makes infinitely more sense to run Linux on a Virtual Box on a Windows PC than the other way around , if you want to ensure that you never run into a situation that you are prevented from doing 'task x' in the intended way due to OS limitations.