This very question was well-addressed in November by masak (above poster). See his blog discussion of Perls 5 and 6, which can be summarized by the following quote:
Perl 5 and Perl 6 are two languages in the Perl family, but of different lineages.

In reply to Re: Will Perl 6 Replace Perl 5? by mpeg4codec
in thread Will Perl 6 Replace Perl 5? by aecooper

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