I buy most of my books from thrift stores, the major advantage of this is that I can spend less money, get things that may never be published electronically or that I didn't know I wanted, and don't have to make any record anywhere of what books I own. (On the receipt the purchases are charged in generic categories as opposed to specific titles. Even if I were paying with a credit card you wouldn't know what I have.)…
There's nothing fundamental stopping e-books from being random access, type in the page number and there you are. Then again, e-books can sometimes lose page numbers altogether.
e-books don't come with DRM or a record of purchases if you torrent them or get them from Gutenberg, whereas you cannot conveniently steal a paper book.
Just some more pros and cons I thought of.