Just before I even start,I want to mention that I'm a fan of MS Office and don't really like Google Sheets ( it's like a toy to me). Having written this,I still do believe that there are millions of people out there for whom browser based spreadsheet application is all they really need. Those aren't people doing tens of thousands of rows manipulations from database extracts.Those are the people who'd have a simple file and do simple things with it. I see a lot of consultants working with it: they create UAT stories,share with multiple users on the client side and everybody knows what's going on.