Perl 6 did get released, with that name, after years stuck in development (source: https://developers.slashdot.org/story/15/12/26/0354235/perl-6-released https:

Perl 6 did get released, with that name, after years stuck in development (source: https://developers.slashdot.org/story/15/12/26/0354235/perl-6-released https://developers.slashdot.org/story/15/12/26/0354235/perl-...). Only later was it rebranded.