I think megathreads are useful for things like an album release or a weekly episode release. It gives a place for conversation to occur without flooding the community with duplicate posts. I think the megathreads you’re referring to though are the ones where it’s like “New DIY-ers, ask questions here!” I agree that those should stay gone. No one reads them and they aren’t helpful.
I’m convinced their username says “its no tits” and no one can convince me otherwise