Feels like the big blocker is that it seems to only be useful if you insist on a language that is Perl-like but also modern, but most Perl programmers probably moved to other languages already and don't care about whether their language is Perl-like, and the remaining ones are probably mostly maintaining Perl 5 codebases that they don't want to rewrite.
Ignoring the Perl angle, it's a language with a small ecosystem that doesn't seem to provide any groundbreaking advantage compared to existing languages, so no reason to adopt it.
In general, to become popular a new language needs to provide one of those:
1. A new groundbreaking and useful paradigm that cannot be added to existing popular language ecosystems without a total compatibility break (e.g. Rust)
2. Compatibility with an existing ecosystem and significant improvements (e.g. Kotlin)
3. Being the best among languages required by a platform or program (e.g. Swift, also JavaScript when introduced)
4. Have one of the best ecosystems for a specific niche (e.g. Ruby when Rails got popular)