&gt; Does it matter? [...] Often, the latest and greatest is defined in terms of incremental changes from the body of generally accepted knowledge.<p>I don&#x27;t know.  Some fields that&#x27;s true, and some fields that&#x27;s not (a book on the latest and greatest of web development from 2006 would be highly out of date).  Constraint Programming isn&#x27;t a field I&#x27;m versed in, so I&#x27;m asking to find out whether or not it matters.