Modern Perl book was first released a few years before P6, which isn't even released yet. The companies that currently use Perl (at $work, even) are not going t

Modern Perl book was first released a few years before P6, which isn't even released yet. The companies that currently use Perl (at $work, even) are not going to switch to P6 any time soon, but can, and do benefit from the more recent best practices using Perl 5.