Not sure how you see Perl6 and Nim/Crystal as being competitors...they occupy completely different niches.

Perl6 is supposed to be a new approach for dynamic scripting languages. Maybe you think stuff like gradual typing means it is trying to compete with systems languages...but I don't even think it is the case that "idiomatic" Perl6 will have a lot of type annotations and I personally don't use them much.

I think a better comparison is Racket. Racket is also trying to push the boundaries for dynamic languages. I do not consider Python3 to be a competitor because it seems quite clear that Python3 is not intended to offer up much in the way of fresh thinking, just a cleaned-up Python2 (which is perfectly fine).