At some points during the day, especially when the Americans go to sleep, there are more bumped old questions than new questions.
I can't remember ever seeing someone write a decent answer for a question that is 4 years old. I am not saying it never happens, but I do not have data to support the claim that it happens enough to make the bumping worth it.
People mostly just seem to ignore the bumped questions; I don't think they get interacted with a lot (again, we need data to confirm if this is the case).
Often a question gets bumped many times and no one upvotes or downvotes the answer(s). It wasn't even clear to me that is what we are supposed to do. And I am not going to do it because I don't see the point in upvoting an answer from 2019 to a question that was asked in 2019.
How has this improved the quality of superuser.com? It hasn't. It has wasted precious volunteer time.
I am not sure if bumping should be stopped, or the frequency should just be decreased (or based on the frequency of new questions), but someone should gather this data and adjust the config of the Community bot imho.
Also, I'd love to get some data that enables us to see if bumping ancient questions is worth it.