I disagree , some people don't have nearly enough knowledge to implement threads into Perl , telling anyone who wants threads that they should simply implement them is rather dangerous and possibly disastrous(considering that person may not be an expert on the subject , and maybe some people want to write industrial-strength code using Perl threads and don't need amateurish implementations of them ).

From another point of view , many people just want to use threads , they don't need to implement them for that , they just want to USE them. It's a basic language feature for any decent language ( yes we're in 2009 ) and it's only normal to expect that Perl should have them . It seems most of the times , this is countered by an argument of the form "you don't really need threads, use POE" , which is ok , but that was not was asked in the first place .