21st Century Library Catalog: NCSU

I tend to agree with this article in that the major problem was the difficulty of searching by subject.  So often narrowing down a search term seems next to impossible.  And, with the differences in language, not all terms mean the same to all people.  A few features that are discussed which seem great are the "auto-correction of mispelled words" and browsing the catalog without entering a search term.  Having the "browse titles by subject" screen is also a benefit.  This article was published in 2006.  I wonder why more online catalogs aren't more like this?