Comment by Ultimatt

The Rakudo compiler targeting MoarVM is also "finished" in the sense I expect it would take you a while to find something not implemented from the spec. More advanced things like concurrency and parallelism features are ready, and there are even nice things built out of them like the Cro microservices framework https://cro.services/. You can also build applications with Cro using full integration with a JetBrains based IDE https://commaide.com/, which feels like a level of maturity and support someone might expect of a finished product? Thats the real myth, is someone can read this article and still not realise Perl 6 is an entirely useful and complete language with a good implementation and nice tooling.