Apocalypse now, casablanca, bowling for columbine, etc. were made in a certain context. That context can't be captured and commercialized because history moved on and it isn't there anymore. They can't completely exist in a vacuum. When I look at today's aaa movies whether the context is lacking or the movie suffers from the formula and lack of originality or personal vision (as you point it).

I remember gummo, searching for the wrong-eyed jesus, american honey, chop shop, land of plenty and winter bones. I am pretty sure three of them will pass the test of time.

(I am not american nor living in america so I don't know the movie scene as well as the european one)