From an interview with Joel and Ethan Coen by Ramin Setoodeh in Variety:

Has [the movie business] gotten more or less crazy with time?
Ethan: Probably less crazy, sadly.

Is that because studios are less inclined to take risks?
Joel: Is that what it is? I’m not so sure, to tell you the truth. Studios have always been, in a certain way, risk-averse.
Ethan: I agree — I wouldn’t blame the studios. Like Barney Frank once said: “People talk about how horrible politicians are. Sometimes the electorate is no prize either.” The audience for movies, their tastes have gotten more homogeneous. Mainstream movies used to be more adventurous because people went to them.

As someone who pays attention to box office, all I can say is: Amen.