Different media have different affordances and cultures. I happen to think: email is for discussion with people, and occasionally for notifications/reminders

Different media have different affordances and cultures. I happen to think: email is for discussion with people, and occasionally for notifications/reminders chat systems are for talking in near-realtime Usenet is for long slow public conversations forums are like Usenet but worse for reading RSS is for reading periodic content - comics, newspaper articles, magazine articles, columns, blogs Newsletters are clearly periodic content, so RSS is the way.