Look at Apple. So many competitors have sprung up based on features that are missing in the existing products. Apple still win the consumers. It's more than

Look at Apple. So many competitors have sprung up based on features that are missing in the existing products. Apple still win the consumers. It's more than adding features to a product. I suspect Facebook is easy to use because people can see the benefit in learning how to use it. They can see how tagging an image is a cool thing, so they'll make the effort. If they can't immediately see how upvoting a question is a cool thing, they won't bother to understand how to use it.