American writers often break from literary tradition because, the audience always wants something new, surprising, unusual, etc. Like anything else on this world Authors change. I believe that writers are justified in challenging the status quo because literacy is an art, and like any kind of art it evolves and changes creating new things. Any attempt to stop change is simply wrong and insult against creativity.
Modern day writing is only slightly different. Today, we don't use English like Shakespeare did. Shakespeare wrote more than just plays, he wrote poems and some books. Today, authors like J.K. Rowling use their imagination more to create stories about wizards and kids with magical powers. Back then, they did not come up with such magical powers unless it spoke about God or Jesus.
