Have you bumped into the new marketing thing for Office 360?   You can rent the software (the whole enchilada) from MS for just $100 per year.  

Why?   Because businesses can expense rental differently than buying software -- one is a fluid expense and can be charged off in the year of the rental, the other is an asset that has to be pro-rated over the years of use.   Plus with rental you always get the current stuff as upgrades are automatic.

But, when you look at it the way my wallet sees it, it is $100 smacks a year for something I could get for free in Linux/Android/Google/etc.   And as an older American, I don't WANT unnecessary changes and learning curves in my software.