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.
What from reddit do you hope to never see on lemmy?
i can’t stand megathreads – no one reads these! no one wants their posts banished there!