> It’s fine as a replacement for Word (I guess? I’m not much of a Word user).

Google Docs is to Word what Google Sheets is to Excel in terms of functionality. As long as what you're doing is simple, it's fine, and if what you're doing requires collaboration, it's great. But when you want to do something remotely complex, Docs and Sheets largely get their asses handed to them by Apple's free iWork apps, let alone Microsoft Office.