I would not hold my breath. I would not be surprised if even more nations will get access to nuclear weapons in the future considering how many new nuclear reactors are build all over the world. So more nations might eventually go with nuclear weapons in the future. Like in Brazil. Or Japan. While it seems not to be clear for now most nations still keep the options of making such weapons in the future. Particularly when it comes to Brazil their military and civil nuclear programms cant be separated. Many nations still use the US as nuclear shield like Japan. But if this would change tomorrow not even Japan would hold any longer on their "we don't need nukes" policy. Nuclear energy is always related with military use one way or another. The more nuclear reactors are build the higher the risk to see nuclear weapons developed in the future.