Many law firms are doing automated textual analysis of legal work that used to be done by associates. The fact that they are still making more profit implies that they've just gotten more efficient. I suppose that there are a set of legal software companies that are probably profiting pretty well on this.
"Similarly, the number of hours logged by first-year and mid-level legal associates -- a productivity measure of young lawyers -- fell 12 percent from 2007 at some of New York’s largest law firms, says Jeff Grossman, national managing director of Wells Fargo Private Bank’s Legal Specialty Group in Charlotte, North Carolina. Yet profits per partner climbed $50,697 to $1.5 million on revenue of $66 billion last year, according to a separate survey of 86 of the world’s top law firms by The American Lawyer magazine."