you won't be able to tell if they do. only the loudest dogs bark. if you cannot use a feature how can you know if you really need it. vice versa, if it does not exist, how do you know you don't "need" it. life was fine without smartphones and Facebook too.
True. But we think that overall simplicity (not feature completeness) should be the driving principle when you're starting out. Educating your users step by step. If you give new users Facebook in its current form, they would have no idea how to use it ;)
