From Why Iím Learning Perl 6:
"Itís funny, fifteen years ago everyone was saying how Perl was shooting itself in the foot with a massive language redesign, because the world was clearly going to switch to Python and Ruby. Well everyone did switch to Python and Ruby, but now everyoneís got the itch to switch again because it turns out Python and Ruby werenít designed for concurrent code execution. Maybe shooting yourself in the foot isnít such a bad strategy, if what you need are bionic robo-feet."
"Concurrency is hard and if you want M:N thread multiplexing (i.e. WEB SCALE CODE, where application threads arenít pinned to pthreads) your options today are precisely Erlang, Go, .NET, and Perl 6."