Why are "chat" and "emotes" something only found in MMOs? Because NPCs are not people? They are in an RPG.
I wish I could type replies to some of the things NPCs say. I wish I could applaud after a Bard performs in a tavern. I wish I could dance and drink and carouse.
I guess since single player games have no other players in them, developers think this is a waste of resources? They just do not see NPCs as our door into the worlds they create.
What do you think? Bad idea? Good idea? Do you care? 


That's the extent of my own interactions!