If, in the past, Facebook allowed people to come together in a broken-up sort of way, with a person creating a message, “posting” it and waiting for their friends to reply, with this new system people will be constantly aware of one another’s communications. They will be instantaneously and continuously connected. But many commentators have remarked that this new communications channel might be a step too far. It won’t just make communications easier. In a world where we already have emails, texts, instant messaging, video conferencing and mobile phone calls, it could lead to communications overload.