I use Sci-Hub as a source for academic literature.
Sci-Hub has the massive advantage over JSTOR that they don't claim to own the work of millions and academics who worked for the general betterment of humanity and then hound people who challenge this to suicide. For me this is a compelling advantage.
A basic process of science, publication of results, has become an exercise in restricting access to knowledge for profit. Sci-Hub is the only way most people have of accessing much of the academic literature without encountering endless punitive tolls.