After I graduated, my first couple of jobs involved extensions of my college capstone (that's basically a "Bachelor's Thesis", for those who weren't reading this journal back then). I needed MS Office to make sure that my Office-generated documents didn't lose any vital formatting, and I had a legacy copy of the Industry-Standard GIS Software that, again, was a strictly Windows application.
Over the years, OpenOffice became increasingly adept at opening MS Office documents, and more than one open-source GIS package has emerged. The one thing keeping me in Windows was that Industry-Standard GIS Software; map files created in it are notoriously twitchy about migrating even to other copies of the same software.
Well, as I mentioned before, that application has completely given up the ghost.
There is now nothing that I do with this system that I cannot do with Linux.
It's time to seriously look into migrating.