Well, until the LibreOffice Foundation gets a bit smarter or greater business support from some heavy hitters. Microsoft relying on Office is on shaky ground.
People arguably use MS Office out of habit and since it's a forced de facto standard at work. But, there is no reason they can't switch to LibreOffice for 95% plus of what people are doing.
My org is basically at this point exclusively Google docs. Chromebooks for support staff and Linux laptops for devs. I think only sales is still on windows.