Another, somewhat depressing, way of looking at it is that we all could have learned half a dozen languages in the time we spend browsing and posting to no real end on forums and various other media such as this. And e.g. learning Russian would make you feel good at the end of it. Whereas when you look back at the years of social media (which, again I would include sites such as this) it all seems like quite a tremendous waste of time. Yeah, we're totally changing the world by expressing and sharing our views, values, and opinions. /s