This seems to have been added recently, but in the forum we cant comment on posts after a certain amount of time. It’s great to be able to open old relevant threads or respond to things such as the P1 issue below:
Can someone change settings so threads don’t close?
Hi Erik 
I just reopened this post.
We’re trying to strike a balance here: sometimes older threads aren’t relevant anymore because the issues they describe have already been fixed.
That said, we’ll be more careful moving forward to avoid closing threads that are still useful for ongoing discussions.
Thanks @Agustin_Carozo 
IMO any thread that get’s reopened is most likely relevant for the user(s). Or sometimes the topic thread is very relatable and it’s easier to continue the conversation in this thread.
