Even then, the vast majority of professional use of Office is handled perfectly well by their online offering or Google's Docs.In a lot of professional environments it is not. First of all, many employers do not like uploading documents into a cloud.
Secondly, in an organization that uses Microsoft Office (which is probably still the vast majority of organizations), it is often not a replacement. A lot of Office files (especially with macros, etc.) do not work properly. Colleagues expect you return a document with updates with Office's 'track changes' functionality ("here, you have a Google Docs link with my changes to your Word document" will not fly).
I think Microsoft still has a large advantage in big organizations, due to their traditional dominance. And Office 365/Exchange has added collaboration features as well (that work with Office on Mac and Windows).