Yes, it's become a big part of pop culture, but really, it's vastly overrated (like most of Kubrick's films). The imaginary symbolism people have made up to tie the film in with moon hoaxes, overanalysis, etc. may have given the film a larger cult, but don't really help its reputation, nor that of modern "culture."

In the book, Torrance is a disgraced teacher descending into alcoholism. In the film, as Weary points out, Torrance is obviously batshit at the initial job interview. And therein lies the big problem with the film, along with Duvall's whiny annoyance of a character, as well as the kid, who's pretty annoying, too. Not hard to understand why Jack wants to turn them into kindling. The Overlook itself and its endless corridors are the real star of the film, and the final shot is a haunting one.

That all being said, when a version more accurate to the novel was attempted as a TV miniseries, it was a flop. So something to be said for the auteur interpretation, I guess.