Java has support for threads built-in. My college textbook Software Construction with Examples in Ada treats threads as an important concept in CS. It advocates first decomposing a system into its different concurrent processes, and then writing threads to perform the different processes.

A similar textbook "with examples in Perl" would therefore be an impossibility.

In real life perlmonks.org is multi-threaded. Each of us reading and posting is in real life a thread. An inability to support threads could choke Perl's future growth.

So the question is, should Perl support threads? How much of a deficiency is this inability to write threaded programs using Perl?