Presently — faced with the immaturity of Chinese sci-fi — everyone in our sci-fi community is envious of the adult sci-fi readership in the US, and see it as a sign of maturity in sci-fi literature. But one must know that senility comes after maturity, and death comes after senility. The prosperity of US sci-fi is largely a result of the prosperity of its movie and TV industries, and these sci-fi movies and TV shows are but a stylistic extension of the “golden age” (sci-fi). Contemporary sci-fi literature itself in US is already deep in twilight — full of works applying complex techniques to express dense metaphors, completely devoid of the youthful energy of the “golden age” (sci-fi); and many magnum opuses in recent years already have an air of death about them. Americans under 25 these days basically don’t read sci-fi; I don’t see what’s to be envied about that.
But to look at it in another way, sci-fi literature is by its very nature immature — because it shows humanity in its childhood, filled with curiosity and fear for the vast and profound universe, as well as the urge to explore it. In the face of such a universe, human science and philosophy are very immature, and sci-fi is the only literary form available to express our scientific and philosophical immaturities; so it’s no surprise that sci-fi is filled with immaturity. When human science is developed to the furthest extent and everything in the universe is discovered down to its minutia, that will be the day sci-fi dies.
Here is the entire Reddit thread, via Benjamin Lyons.