I mean failure like the tyrannosaurus rex. That is, from an an evolutionary perspective. Not at the arbitrary present. And I'd wager that Perl is still actually more used than Python or Ruby, it just doesn't get the love on social news sites and elite blogs.
I think Perl has been relegated to short scripts and legacy code bases. I don't see a lot of new projects being developed in Perl. That's what I meant by leaving it off the list.