Yes. Although MAD doesn't necessarily require the end of the world (eg nuclear winter), or even the end of a regime. It just depends on consequences which are "unbearable" for either nation.
I've always felt that the best strategy against NK is to simply wait for the regime to collapse on its own (along with sanctions that isolate them, FWIW). This is fine as long as they don't try to invade South Korea, leading to swift US-backed retaliation. But perhaps now as they continue to develop and "show off" their nukes, they'll feel emboldened to "try something" before their time runs out?
I've always felt that the best strategy against NK is to simply wait for the regime to collapse on its own (along with sanctions that isolate them, FWIW). This is fine as long as they don't try to invade South Korea, leading to swift US-backed retaliation. But perhaps now as they continue to develop and "show off" their nukes, they'll feel emboldened to "try something" before their time runs out?