Perl was a widely-used programming language but now there are a lot of good alternatives in the world. Good? Ah, I mean people prefer to write

def f(x, y)

or

def f(x, y):

instead of

sub f {
    my ($x, $y) = @_;

because of laziness.

One of the interesting indicator is Modulecounts. Today RubyGems is bigger than CPAN since 2011, and PyPI is also bigger than CPAN since Jan 2013. Stevan Little said

if you still believe that CPAN is why Perl is still relevant, then you have clearly not played around with other systems.

in Perl is not Dead, it is a Dead End, other than that I think this slide is a good review of the current status of Perl.