With QUIC, even TCP is getting replaced because of the need to innovate despite protocol ossification. It's almost impossible to improve TCP at this point due t

With QUIC, even TCP is getting replaced because of the need to innovate despite protocol ossification. It's almost impossible to improve TCP at this point due to non-compliant endpoints and middleboxes. It's a similar "lowest common denominator" issue with IRC, XMPP, mail and many others. Yes, XMPP can - in theory - do almost everything Slack does, but there's dozens of clients supporting a different subset of the protocol. Of course nobody wants to use it.