This could be a very powerful tool if the right options are added. One of the things I’d like to see is the ability to set an upvote or comment threshold. If posts were popular, I would like to keep them. If, however, a post received very little upvotes and had little interaction, there’s not much value in keeping it. And I’m talking about all interactions here, not just from members of our own instances.
This doesn’t seem like a very hard thing to implement and would be well received.