There is nothing else "to sell."
I always give clients the choice between an "overpriced, bloated, forced to create an account with Microsoft so that they can watch everything you do" copy of MS Office or a "totally free and fully supported" Office program like LibreOffice.
You'd be surprised how many stick with MS.
If LibreOffice had it's own inbuilt email client it would be a better program, but when partnered up with Thunderbird (or one of the many other great alternatives to Outlook) it's just as good as MS and totally free.
But it's all about "the cloud" these days. Business people want the features that only MS can provide.