So just because other tools have this feature it is bad that Office gets it too? I use Microsoft Office and this is certainly a welcomed feature.
I'll reconsider office 1.) when it is free 2.) when it works seamlessly on a Mac.
So, for the past year or two? https://office.microsoft.com/en-us/myoffice.aspx
The free online Office apps work great in Chrome on both Windows and Mac (not sure about Linux).
Last one I paid for was Office 08 for Mac and it was quite buggy.