At my university library, there are a bunch of books from the early 2000s already with titles like "Web Content Mining with Java" (Tony Loton, 2002) and "Data Mining: Concepts and Techniques" (2001, Han Kamber (and 2006 and 2012)), as well as a whole lot of others. (Though most of these books are more about introductory statistics and using databases).

The seeds of the current world were already being sown some 20 years ago.