I do not purchase Word for my own equipment, but I do use Word on the machine in my office purchased by the university. Students tend to submit their major work (theses, dissertations) to me in a Word format. I have an oral this morning and found myself attempting to get at my comments on a proposal without Word on my Mac Pro (I always work with files in DropBox so access was not the problem).
After putting several hours of work into the manuscript, I assumed I would have to open in Google Docs during the oral and then send my detailed comments to students for her review. I work back and forth when writing, but I had not investigated the translation of comments across software. It turned out that Docs did a great job of converting the comments with the standard translation procedure. You may have already worked with this feature, but it was new to me. Knowing this, I can now rethink my work flow.