Dirty tricks
This is all Microsoft seems to know at the moment.
Icons mixed in with apps on the start menu, widgets that open with a hover, big search bars, links on the Lock Screen / wallpaper that open Edge/Bing.
And deceptive 'Start backup now' that moves your files to the inadequate 5GB OneDrive. Even in a Mac, I've seen Office ignore local/iCloud and store files straight in OneDrive without making it clear.
And I can think of half a dozen Microsoft apps that seem to have the capability of changing your local Windows account to a Microsoft one. Before you know it, files are at the mercy of your MSA, thanks to OneDrive and/or Bitlocker.
I frequently have users that don't know how they ended up with Microsoft products and services taking over.