That's an increasingly small number, if only because now Google is in that market, too.

However, there is a second reason you need Office, and that's compatibility. I don't use Office for work normally, but I still have an Office account (which, annoyingly, is how you pay for Office now), because I have clients who want to work on their formats and it doesn't make sense for me to work around compatibility and have an argument about it instead of just paying for the damn thing and working with whatever software other people want to work.

But if I was by myself and didn't need to work with anyone else ever? Yeah, I would not miss much from Office, honestly.