I started reading this with the impression that open threads should be more frequent, but I changed my mind as I've read the previous comments. I'm not calling for open threads to be posted more often. However, I too support an experiment.

I want to point out that similar to having open threads with specific topics, users can also post or share a periodic thread that hasn't been around for a while. I've noticed user Gondolinian has been doing this with diligence recently. He has posted the latest welcome thread, Lifehack Ideas thread, and Stupid Questions thread. So far as I can tell, the only protocol for inaugurating a new periodic thread is by posting it, trying it out, and seeing if it's well-received. That risks one's own karma, but I believe the blow could be softened by including in the original post a caveat about how this thread is being tried out for the first time, and it will not be continued if nobody appreciates it. If anyone reading this is a regular reader of the open threads, and you notice a pattern of the same topic coming up time and again, and being very popular, maybe try starting a periodic thread on the subject. The outcome of all of this might mean there are more specialized threads which make searching for content easier, don't limit community feedback, and hopefully lessen the traffic on the generic weekly open threads.