In 1973, Hollywood was in the midst of a creative renaissance known as the New Hollywood movement. Several of the era's most prominent filmmakers, Martin Scorsese, Terrence Malick, and George Lucas, all directed their first major successes in 1973. The year also saw the elevation of the horror genre to blockbuster status with the premiere of William Friedkin's The Exorcist, which eventually became 1973's highest-grossing film.
Source:https://www.cbr.com/greatest-movies-turning-50-in-2023/