What's the Point of Hardbacks?

I have most of Iris Murdoch's novels in hardback, routinely 500 pages but small and compact, a lovely thing to hold and read on the Tube. But I almost never buy modern hardbacks, simply because they are huge.

The question is posed about popular fiction. Apparently the audience for the latest Nora Roberts or Danielle Steel book is the person who expects to toss the book into a bag to take to the beach on on an airplane, read it once, then give it away or forget about it. The nonfiction and literary world are much more into hardbacks that last and can be enjoyed or consulted repeatedly.