I am using the most current version of Thunderbird (115.8.1) with Windows 10 and with macOS Sonoma 14.2.1 with Apple M2. I have googled for help and I have searched the Mozilla Support pages. I cannot find any way to permanently disable message threading. I am beginning to feel that it can't be done. It is no wonder Thunderbird is getting such terrible review of the current version. Threading is a major issue for lots of Thunderbird users. The inability to disable threading has me looking for an alternative mail application. But, before I give up on Thunderbird I am hoping that someone has finally figured out how to disable threading (on all existing folders, in all mail accounts, and by default for new folders). Is it possible?