This is similar to the improvement Facebook made when they added a few emotion buttons beside the like button. It's technically a pretty small change, but it af

This is similar to the improvement Facebook made when they added a few emotion buttons beside the like button. It's technically a pretty small change, but it affects what is seen as one of the core features of the website. What's Facebook? Oh yeah, that thing with the like button. What's Twitter? Right, it's that thing with the 140 characters. They must have spent a long time deciding whether it would be worth disrupting what made them popular in the first place to add a new feature. And in Twitter's case they probably also waited until single SMS messages were no longer really necessary.