The sibling comments aren't wrong. However, Perl 6 was originally intended to be the next version of Perl. For a long time it was vapourware, however, and devel

The sibling comments aren't wrong. However, Perl 6 was originally intended to be the next version of Perl. For a long time it was vapourware, however, and development restarted on Perl 5. When Perl 6 finally arrived, it was too much of a step change from Perl 5 to convince many people (myself included). Meanwhile, Perl 5 had continued to develop and was, in no way, in need of a replacement.