This is mature technology, with no shortage of competitors to do e-mail, word processing, spreadsheets, presentations, etc. Some people will accept punishment to maintain the status quo. Those who tightly integrated all sorts of nifty VBA and macros will hang on to the bitter end.

The easiest exit strategy is to run Libre Office on Windows, while gradually phasing out any other products that are locked into the Windows platform. OS X is the easiest migration, although Apple can get really obnoxious about deliberate obsolescence in their software and hardware. Linux is the final solution, in which the licensing problem is put to bed once and for all.

I fired Microsoft several years ago, so I won't be attending the MS Office retirement party.