Most relays honor the delete request. But it's only a request. Don't have to honor the request. As I said most too. Then there's also different caching services and local caches and local relays. These can all house the deleted event. Some will hold it forever. Some will hold it until the cash is purged. Because of this, we say there is no delete on noster or we say that you can only delete 99.99% of the instances of the content. There could be an archive server or relay out there that never deletes anything. You would never know.