Better technology to capture nuance in performance, but also better acting methods such as the American schools of Stanislavski's method as well as the Meisner

Better technology to capture nuance in performance, but also better acting methods such as the American schools of Stanislavski's method as well as the Meisner Technique. These new techniques brought a richer psychological dimension to acting. Also, we don't have many very early films due to the combustible nature of silver nitrate, so more and ultimately "better" films survive from later in cinema history.