Assuming every OS ships new Perl is a good way to lose a bet, since RHEL and CentOS are happy to hand you a system package from years ago.

All the gradual typing and signatures in the world do not matter when the interpreter on the target box is old enough to miss half of it, and then you are dragging in CPAN modules or juggling shebangs just to get the same script to run everywhere. Bash at least advertises its limits. Perl can look like a nicer shell tool right up until deployment turns into a version scavenger hunt.