This is an interesting point. When I was in college and certainly during most of my professional career, you really had to use Microsoft Office if you wanted to get any real work done. As someone who now works in higher education, I can definitely say, though, that this is changing. MS Office files (.docx, .xlsx, .pptx) are still the default format (especially for file sharing), but I wonder how much of that is driven by the generational culture of administrators. In particular, I see younger employees embracing non-MS productivity options. Google's software suite, for instance, has become quite prevalent for lateral productivity (across the same rank), where the "formality" of Office isn't necessary. I've also noticed more students submitting work in Pages.