You must be talking about a home environment. I'm talking about a Windows Enterprise environment. Would you risk your job by recommending free Linux applications over industry-standard Microsoft applications? (NO!) Companies share/send documents with each other all the time and the Microsoft Office suite is the biggest example of course. All that it would take would be one major incompatibility problem between you and another company and they'd be asking you, "Why did YOU convert us to Linux applications?" There's so many more examples involving other enterprise-wide applications and if you don't understand that then you have no idea what I am talking about.