Nuclear weapons will 100% be used again. All it takes is one sociopathic dictator who thinks everyone else is weak, and we know that the power is a magnet for sociopaths and any country can be turned into dictatorship within a decade give or take. Putin of today or another dictator of tomorrow, does not matter. It does not even matter which country is going to pull the trigger, the invasion of Ukraine has started the race to acquire nuclear weapons and all countries have to participate or perish. The gun is on the stage and therefore it will go off.