What if sound had come to movies 10 years later?

Would gangster films have become as popular as they did in the early 1930s?

Would we still have had the Production Code?

Would Keaton have stayed at MGM?

When would Preston Sturges, Busby Berkeley, Fred Astaire, and the Marx Brothers have come to Hollywood? Would they have stayed in New York throughout the 1930s?

Would City Lights and Modern Times have been exactly the same visually?

Would Citizen Kane have included more sound experimentation?

Would we have had a bunch of film noir musicals in the 1940s?

What would have been the 1937 equivalent of The Jazz Singer?

Would the Warner Bros. and Disney studios have survived the Great Depression? How about Columbia?

Would Disney have made Fantasia before making Snow White and Pinocchio?

If sound hadn’t come in until 15 years later, would David O. Selznick have made a silent Gone With the Wind? Who would have been the director? And who would have been the actors?