I say that as a user who LOVES reading digital books from the library. I got a Kindle ~a year ago, and have read around 25 books, all but one borrowed from the library. I would have paid for those books before, but now get them instantly, for free. It's amazing! Even getting/managing holds isn't a hassle- I check for my next book a few days before I finish my current book, and that usually results in getting off any waitlist by the time I'm ready to read it.
Obviously, I could get the physical books from the library before, but I didn't find myself doing them- the logistics were slightly annoying, if I'm reading a physical book anyways, I tend to want to just grab a copy for my collection, with Amazon I can get a book the next day. Digital book distribution does feel different in a tangible way to me.
So as a result, I am now not spending $250+ a year on books. I suspect I'm not the only one in the situation. Currently- I love it. But I'm wondering if it is sustainable.