And as I said lots of time, most of us liked ponibooru for the people not the images, if you want to go to pbooru for the image fine, but for the people that like the people, we will stay here.
I have fond memories of Ponibooru as the first imageboard I looked at when I got into MLP. That said, it was an unmoderated clusterfuck of stupid tagging and spam. Let it stay dead.