Comment by yakz

This is one that's already true and "everyone" hasn't figured it out yet. But you don't really even need Office as a viewer, PDF is fine (for printable/portable fixed-layout) or just HTML. "Office" is a product that doesn't need to exist anymore, at least for the core apps. For day-to-day office work, you probably shouldn't be using those legacy apps, you should be reviewing portable document formats and asking an agent to make the revisions that you want.