Well, because at least

WARNING: Subroutine signatures are experimental. The feature may be modified or removed in future versions of Perl.

And it's not good practice to use experimental features in production code. And if I remember right, in one of the latest versions signatures syntax been changed (position). And default signatures does not supports typing. And I can't force other authors to use them, so can't have completion/navigation on their modules.

In reply to Re^2: Request for Comments: More annotations for Perl plugin for IntelliJ by hurricup
in thread Request for Comments: More annotations for Perl plugin for IntelliJ by hurricup

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