I think the *pace* of change is likely due to the flood of ebook readers and other new devices. When I got my kindle, I bought a bunch of books straight off. Now, I'm back to status quo ante - I buy books when I need them, or when the lust strikes.

Oddly, ebook purchases have meant that I lust even more after good print books - a beautiful Hamlet folio, the wonderful print editions of Vandermeer's City of Saints and Madmen, that sort of thing. At the same time, I'm much less likely to buy a mass market paperback if there's an e-equivalent. Are you feeling the same thing?