assuming that nuclear nonproliferation is gonna hold up indefinitely for any reason is some real fukuyama's end of history shit
let alone "because it's Rational™ thing to do", it's only in rational interest of already-nuclear states to keep things this way. couple of states that could make a good point for having nuclear arsenal and having capability to manufacture it are effectively dissuaded from this by american diplomacy (mostly nuclear umbrella for allies and sanctions or fucking with their facilities for enemies). with demented pedo in chief and his idiot underlings trying their hardest to undo this all, i really wouldn't be surprised if, say, south korea decides to get nuclear
yawn