The main problem in my eyes is not enough volunteers (although they are doing a superhuman effort) to get it into the production level it needs to get more widespread adoption. The other problem is that Python already has a huge amount of libraries and is considered to be "good enough" feature wise, so it's hard to attract interest.

I do enjoy reading Raku code and think it is super neat as this do it all post-modern language. Inertia is hard to overcome though.