Free storage? You could store a gazillion word processing and spreadsheet documents on a normal hard drive (and back them up on Dropbox if necessary). Awesome software? Hardly (and I've used them for years before I switched back to desktop programs). The word processor still has bugs that should have been weeded out years ago.
So the question is relevant: Why not just use LibreOffice?
So the question is relevant: Why not just use LibreOffice?