The studio system broke down in the late 2000s, between China becoming a market and the massive, MASSIVE flood of money from lotr, HP, marvel and other similar copypasta franchishes the pressure for sequels and the like exploded, and independent directors lost a lot of their room to experiment.
Streaming is the second half, everybody wants something with a long tail, ie you can recognize it from the Netflix catalog, which pushes harder for sequels and franchises