Lassen's Night Shade Books is a publisher of books important to the SF/F historiography. Night Shade keeps alive brilliant writers like Manly Wade Wellman and Clark Ashton Smith by releasing beautiful editions of their works. They also promote exciting, and often overlooked, new talents like Liz Williams and her Detective Inspector Chen series.
Lassen's trying to bring in new fans and introduce them to classics. Grossman is content to denigrate those who are introduced to SF/F via Hollywood. This is ironic, because Grossman's blog at Time isn't usually so filled with venom, and his writing is engaging. One expects a little, "I wish the casual fan understood how rich the SF genre is," but one would rather not read "the rapid expansion and mainstreaming of -- for want of a better term -- nerd culture is a dangerous thing." This isn't to say there isn't room for criticism of SDCC, and how commercial it has become, just that I would have rather read it without the snark. Snark is so 90s.