I've used Raku, it's actually pretty good. It's the first language I've used in a while that I genuinely enjoyed and had fun working with. Alot of the articles that get posted to HN about Raku are often like this one, showing how to push the envelope in Raku, but I wouldn't so so far as to call it an experimental language. Just like in the Perl tradition, you can do some straight voodoo in Raku but it's not required either. It's fairly straight forward on the surface and has all the familiar accoutrements of a modern language. You can be productive without having to delve into any of the esoteric and experimental stuff but can still get 'underneath the hood' if you need to.