Even if I decided I wanted to try it I wouldn't after reading this: Threads profile can only be deleted by deleting Instagram account, Meta says
https://techcrunch.com/2023/07/06/threads-delete-profile-instagram-meta/

>In a ‘Supplemental Privacy Policy,’ Meta explains: “You may deactivate your Threads profile at any time, but your Threads profile can only be deleted by deleting your Instagram account.”

>The rationale, Meta elaborates on the policy page, is that a Threads profile is part of the user’s Instagram account.