Binge-watching
Before Netflix, there was a time when people would discuss each episode one at a time. The day after a new episode of ER aired, everyone at school or work would be chatting about their thoughts, feelings, and predictions of the storyline. Since binge-watching has become so popular now, it is difficult to be at the same point of the season as someone else. This makes discussing the show nearly impossible because of the risk of spoilers.
Less people talking to each other about the show leads to more of an isolated experience.