It's Office, silly. LibreOffice is, in a vacuum, a fine collection of software, but stacked up against the juggernaut of the MS Office suite, it can't compare.

It's Office, silly. LibreOffice is, in a vacuum, a fine collection of software, but stacked up against the juggernaut of the MS Office suite, it can't compare. They're continually playing catch-up, since their mandate is to be compatible with Office, with a fraction of the resources, and always having to react to maintain compatibility. Likewise, businesses run on Outlook and Exchange, to an overwhelming degree; most of the serious competitors have faded away at this point - even five years ago, there were still a lot of Domino shops, but IBM has divested their software divisions, and essentially made that stack abandonware, and so everyone under the sun is moving to Office 365.