Maybe this time it could work?
Of course we've heard of government bodies looking to ditch Windows time and again for the last 20-odd years, and it always flopped – mostly at planning stages, though China did seem to give it an honest try a few years back.
However, this time around the main impediment to adopting Linux is gone: with Office 365, it's possible to read and edit the odd MS Office file in Linux over the web, while new documents could be created using a FOSS tool like LibreOffice.
Unless of course it's all a feint to wriggle out some extra volume discounts from the Beast*... Again.
* Remember when El Reg would affectionately refer to MS as "the Beast"?
Biting the hand that feeds IT
