As you may have guessed, I simply dont know about details of the Threads packages in the earlier Perls.
You don't even know the difference between threads & Thread as you keep conflating the two. And yet, you continue to keep offering advice based upon your misreading of the documentation.
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.