There are many reasons that social media platforms will never fully replace email within the working environment, despite Yammer and others bringing social media and social messaging platforms into the workplace:
Email provides a level of privacy and professionalism
Email inboxes provide a one stop-hub for tasks and one-to-one communications
There's not the worry about privacy issues with email as there is with social media
Email works across all platforms and applications
Email has become more than just a two-way communication tool
Social media does not provide a professional online space for business one-to-ones
Social media has a major issue with ownership
