Meta is about the whole forum and that includes "stats and the system" and I don't see any problem with it. and to be honest "stats and the system" threads are not that much in order to create a childboard for it. and if they ever created one it will most like be deserted. since as far as I can see most "stats and the system" threads are just being updated by the OP. other than that there is not much traffic on those types of threads(at least to the way I see it).