Perl 6 is also Perl, but Perl 5 was the glue of the Internet with millions of lines of Perl 5 code written and still in use. Perl 6 was a bit slow to start and

Perl 6 is also Perl, but Perl 5 was the glue of the Internet with millions of lines of Perl 5 code written and still in use. Perl 6 was a bit slow to start and has not seen wide adoption. With Python, Ruby, and now even Powershell as scripting competitors, people have more options and aren't choosing it as much. Perl 5 was an easy choice when it was practically a standard part of LAMP stacks via mod_perl in the Apache web server. Now there are so many backend web server choices you can pretty much use any major programming language. I don't think Perl 6 will displace Perl 5. Perl 5 may even out last Perl 6.