For anyone who just wants a cleaner Perl, it's there, it works. Descriptively, Raku as a 'scene' draws in a lot of people who come from the poetic school of Perl, which is great, it's clearly well designed for that crowd.
I don't know that I'd call Raku battle-hardened yet, but it's not an experimental language in the sense of having novel semantics, or frequent breaking changes, nor would you expect to hit a bunch of implementation bugs.
I'm not expecting many developers to decide to work in the large with a strict subset of Raku, because you can do that with Perl and get all of CPAN, or just use Python and black and have epsilon of zero problems of that nature.