I've been going through a number of 'Meditations' here on Perl Monks, some of Larry Wall's historical statements on the motivation of Perl, watched Sawyer X's discussion on Perl 7, and had a number of discussions on the Perl Programmers Facebook group on a "wishlist" for Perl 7.
Synthesizing these things deserves a separate Meditation on its own.
FYI -- there have been a number of discussions in other forums RE: Making Perl more competitive for 'data science' applications. I think PDL is a great option currently, but the documentation and tutorials need development. I'm looking into what has been done previously with Jupyter; I'd like to have Perl PDL integrated with Jupyter notebooks to draw some attention to the current capabilities of Perl. I know there is a CPAN Jupyter Kernel, but I haven't tested it yet.