Perl 5 circa 1994 didn't have the CPAN.

Perl 5 circa 2000 didn't have Test::More.

Perl 5 circa 2001 didn't have Test::Builder.

Perl 5 circa 2005 didn't have Moose.

Perl 5 circa 2007 didn't have a usable switch statement or smart match.

Perl 5 circa 2008 didn't have Perlbrew or Cpanminus or autodie or function signatures (at least without fragile source filters).

Perl 5 circa 2011 won't have strictures and warnings enabled by default.

I think Perl 6 will be okay.