I you don't need inter-task communications, then I agree, but the biggest problem people have with using threads is trying to use them in the same way that forks are used. This is true of whether using iThreads or pthreads, or most other forms of threading.

Just as Perl requires the adoption of a different way of working to C if you are to realise the best from it, so once you have relatively easy inter-task communications, a different way of working and thinking is called for.

And there are other platforms than the unix-like world.