You can certainly make that argument, but there is some shadiness to the Microsoft Office suite. MS has been doing for years, with Office, what people fault EA and Activision for doing with the Madden and Modern Warfare franchises - releasing the same product year after year with a freshly ludicrous price-tag. My laptop still runs Office 2000, and I've yet to be in a situation where I needed a new version of Office to open a file I've been sent, nor have I ever been in need of a feature exclusive to a newer version of Office. I've even been able to open *.docx files in Word 2000 with a minimum of tinkering because the file formats are just that similar, even with all those years of "development" and $199 price-tags separating them.
I have a love hate relationship with ms office. The planned incompatibility is the same thing my mother encountered with ms office 2000. She however is getting along with libreoffice/openoffice just fine though (it's similar enough for her). What i am waiting for to be completed that will help bypass a lot of planned incompatibility is wine on windows (wine runs plenty of programs that ms dropped support for and many more). Aside from this little tidbit, I consider ms office better for the features that libreoffice/openoffice doesn't offer. I like libreoffice/openoffice better for the freedom, and that it offers office suite functionality to get the job done.
Stuff i don't care about ms office specifically:
Price
Microsoft doesn't support anything but their own formats very well (whodathunk on that?) which was great for locking people in.
Microsoft's docx shenanigans were disgusting.
The ribbon.
I say that my argument works both ways at the same time which just amounts to pros and cons.
Other nitpicks which just constitute reality:
There's only two realistic ways for people to be able to open the legitimate documents you send them. Using microsoft formats, or send a pdf. Other than that, there's pretty unorthodox ways to send documents such as saving as text, html, or send the document as jpg or png (if you have to send a documents in any of these formats, then that really gets things down to the nitty gritty). **** if people can open odt, but you know that people can open microsoft formats and the other things (at least libreoffice/openoffice user base is increasing).