Although it looks like your advice, when it comes to perl and not general computing, is right:

Without wishing to offend you, this is a Perl forum, and the subject is Perl threads. Ithreads are not forked processes; not pthreads; nor greeen threads; nor any other flavour. COW is not available everywhere, and Ithreads do not (yet) make use of COW anywhere that I am aware of. As such, your prior experience is of little value in a thread relating to them.

I'm still avoiding threads with perl, there's no good reason for lib authors to make their libs thread-safe, thus your perl apps will never be thread-safe, and, there is basically nothing that threading has to offer (well, headaches and longer development times, but if we wanted that, we would be programming java) (But we do get a lot of people who read a book about GUIs, and they can't seem to live without threads these days)

I rarely bother to read threads about web/cgi and related technologies because they don't interest me.

Again, without wishing to offend you, you must have seen the word "threads" in the title of post. You obviously have no interest in threads, so why bother to expend effort to respond? Especially in such a negative vein. Isn't easier to simply note the subject and move on?

FYI. Threads have many, many uses beyond "GUIs", though they are one good use. And despite your undisguised attempts to imply that GUI applications are somehow inferior, for the vast majority of computer users, as opposed to computer technologists and geeks, gui applications are easier to use and allow them to use their computer systems as tools to perform their primary job rolls without having to become computer specialists.

I started to try and explain the way iThreads work, and how they removed the need for the vast majority of modules to have to be coded to be thread safe. At a conservative guess, 90% of the modules on cpan work perfectly well in conjunction with threads, without any special care needing to be taken by their users, beyond not attempting to share objects across threads.

Then I realised that, going by the tone of your post, you simply wouldn't care. You have no interest in threads and your mind is closed to their possibilities. So, I won't bother.

A computer is a state machine. Threads are for people who can't program state machines. -- Alan Cox

I've no idea who Alan Cox is, but it is apparent that he is just as ill informed on the subject.