Many people use social media. They read articles online. The Internet does break down. The electricity does stop flowing from time to time. We do have electricity blackouts. The book existed before modern technology. If modern technology were to breakdown the book will endure. You can carry a book anywhere. It brings you to places and ideas that you never encountered before. The printing press spread the ideas of Luther across Europe. It was harder for the authorities to control information from a book than it is for the authorities to control the Internet.