* The concepts of functional programming that he discusses in the book are over 30 years old but still very relevant today.
* The syntax of languages don't change that dramatically at the core. Libraries, yes, but this book is about concepts using the core language not specific libraries.
* Nobody is "waiting for Perl 6". The Perl 5 community has generally moved on (or left). We are still writing Perl 5 everyday and don't think about Perl 6.
* The concepts of functional programming that he discusses in the book are over 30 years old but still very relevant today.
* The syntax of languages don't change that dramatically at the core. Libraries, yes, but this book is about concepts using the core language not specific libraries.
* Nobody is "waiting for Perl 6". The Perl 5 community has generally moved on (or left). We are still writing Perl 5 everyday and don't think about Perl 6.