"The answers are longevity, maturity, and a rich ecosystem of development tools and modules that developers can leverage for almost any programming task. Consid

"The answers are longevity, maturity, and a rich ecosystem of development tools and modules that developers can leverage for almost any programming task. Consider the Comprehensive Perl Archive Network (CPAN). CPAN is an enormous collection of software and documentation, largely unmatched outside of the Perl community. Yes, other languages have similar repositories patterned after CPAN -- but thus far none have matched CPAN for its size and scope. CPAN continues to grow at a rapid clip."