I can't speak for anyone else, but the reason I did the MS Office on Linux thing was because there is a subset of people who want the proper noun Microsoft Office and will use that as an excuse to not move to Linux. My parents, for example.

I don't really use MS Office for anything but Excel since I don't really do WYSIWYG document editing and even if I did I probably would use LibreOffice or OnlyOffice or something. LibreOffice Calc just kind of sucks as of right now.