...and is slower, more cpu intensive, more memory hungry and threads.

Shared variables are "achieved" by serialising them with Storable and transmitting them to all the other threads</strike</> processes via sockets.

That's like putting a single lane chicane on a multi-lane highway. Necessary occasionally, but totally defeating the purpose of having multiple lanes.

But it'd work on non-threaded perls, and that's the use case for it. It certainly wouldn't make sense to replace actual threads with forks, especially on windows :)