I want to start a thread, but I think I will need moderator support

It’s not how long it lasted, it’s how it ended that defines “petering out”.

After the new rules were laid out, posting became less and less frequent, with lots of “21 days later” “2 months later” “6 months later” between posts. For a while one poster was using it as a blog, just posting news stories with no commentary or discussion.

I assume people still use guns in self defense, but I wouldn’t know if from that thread.

OTOH, SGNOTD actually just passed its 10th year anniversary and is going strong. (Sadly)