The cost is all the features you are missing.
I feel like the word processor as a product is fairly "finished." There's not much about it that'd you want to change year over year. Are there any new features to write home about?
Like? Wouldn't be surprised if those features don't matter for the 95th percentile.
That's how I feel about using MS Office. I have a text file somewhere of all the things I couldn't do with MS Office at my last gig, that I do regularly with LibreOffice.