Of course I can only speak from personal experience. But in my experience, long personal e-mail (several paragraphs) from friends to catch up used to be relatively common, and now they've all but disappeared (I don't think I've gotten any in the past couple of years). Likewise, long chats of the old AIM/MSN variety - spend an hour or two chatting with a friend sharing ideas and news with them - seems much rarer than before (where it wasn't uncommon to have them every few days).