Another Twitter v Tumblr comparison; twitter’s reply system while a little weird, is better. Tumblr’s reply system is messy and inefficient and you can end up sending to multiple people when you just want to talk to one of them. twitter though not only is quick to the point with it and makes sure you stay within a group fo people, it more importantly makes it that you can like someone’s reply. Its a way to acknowledge that you saw the reply and like it, even if you yourself don’t really know what else to say/respond with.