Emails will be stored and shared, if we can get around the firewalls and passwords, but no one is ever going to discover a cache of their grandparents’ emails in the attic. Our digital communication basically just shows where we were at a particular time. We’ll have our calendars and lots of texts saying “I’m going to be 10 minutes late” or “Let’s meet for supper here.” We’re wrong if we think that emails are going be around forever. Even today, some people think emails are too formal, too much effort. In 20 years all of our communication will be instant: texts, tweets, Skype messages. And then we will hardly leave any written record behind us at all.