Being one-of-one, the number one, the only one has emerged as Beyoncé’s most prominent creative ethos. This year, she became the most decorated artist in Grammys history and completed the most ambitious tour of her career, bringing her celebration of Black and queer culture on her Renaissance album to stadiums across the world. Meanwhile, Taylor Swift reached an idiosyncratic tier of cultural prominence in her own right, breaking chart records and delivering an extravaganza of her own on the career-spanning stadium run, the Eras tour. Both artists have been...