General-purpose languages that are "born" successfully (manage to gain a wide following) have a very hard time "dying" in the sense that everyone talks about. New lines of code will be written for 30+ years after a formerly successful language becomes functionally obsolete.

Perl already dead in the sense that it is no longer a "cool" language, and as such there aren't going to be many passionate programmers picking it up.

Once a language has lost the ability to recruit talented and passionate programmers, innovation dies soon thereafter. Perl may have new modules, but I'm not sure many of them can be called innovative- most of it is just "Me too!" kind of work.