The only way someone could make a "new" imageboard today and actually moderate it properly without going insane or handing off moderation to a group who will go insane (assuming it had a decent population) is to essentially make it an imageboard UI for a site you have to log in to. Basically everyone would need an account, but nobody's accounts or names would be visible to anyone else (unless they wanted to use them like a tripcode and selected the option), and the UI would resemble a standard imageboard. This would allow registration to be shut and opened to control overall poster counts, easier moderation, no need for a billion captchas to nerf bots, etc. The problem is that most imageboard users would not want to use such a site for numerous reasons, the main one being that anonymity is the main appeal and the fact that you need an account is a big risk to anonymity if the owner/mods ever decide to be fags about it. Null probably wouldn't be a fag about it but that's besides the point.