The reason nothing has replaced email yet, even tough it&#x27;s an old and clonky protocol is because it&#x27;s an open standard and people don&#x27;t make standards any more. Today you make services (most often based on HTTP because it&#x27;s a protocol any 20yr old junior programmer can handle) that are locked in, harvesting has much data about it&#x27;s users as possible desperately hoping that it could monetize on this data one day.