There are more dimensions to this, too.
The cannon is orders of magnitude larger.
The channels are so much more confused, it's hard to keep up with the stuff you might want.
Backlists are gone, and used bookstores are ever scarcer. If someone worships "transgressive" and I blow them off with "Sturgeon!", where are they going to find any? How can a new or recent reader discover a gargantuan talent like Lafferty? It's amazing news when I say George R.R. Martin wrote a vampire novel.
"It's a proud and lonely thing to be a fan"? It's only lonely if you remember twiltone.