The most innovative technology to have come out of chat programs is Slack's feature that let's you EDIT chats in real time, and leave reactions. This is such a

The most innovative technology to have come out of chat programs is Slack's feature that let's you EDIT chats in real time, and leave reactions. This is such a crazy innovation to the structure of chat programs, that it blows my mind other real time communication platforms haven't incorporated it. Even Facebook Messenger and GChat feel inadequate now that I'm consciously aware that they don't let me edit my chat messages after sending them. It's such a no brainer innovation that nobody has ever done, likely because when you're building a chat program the idea of letting people edit chats after they send them makes the brain of any engineer hurt -- but there's an untapped value to allowing it that many products haven't realized yet.