This isn’t 1950. The Norks have a lot of slaves, but their airforce would be utterly wiped out in one day. It’s hopelessly outclassed by South Korea alone.
They have nearly no ability to project power even within regions of their country. Their Command structure is so centralized that it would be paralyzed by electronic and kinetic methods. They would find it exceedingly difficult to even communicate within the country about our attacks. They are good for a long hard artillery barrage, then would quickly collapse.
They have no hope of a good insurgent war. No food, nearly no cars, and no normal business infrastructure where they could hide in the open. They could not pull off an Iraq campaign.
The absolutely only thing saving them is that China would need to acquiesce to the decision to knock them off.
The 1950 Korean war is a bad template. The south had no army for practical purposes, and our occupation army was simply little more than a constabulary. When the Marines and WWII Army formations arrived, it was over in a blitzkrieg to the Yalu.
The fighting for several years was almost solely the Chinese war. The MiG dogfights were Russians.
North Korea is not only not ten feet tall, they are about 5 feet tall. The South Korean economy is about 45 times the size of the Norks. If they ever attacked the south, the North would be obliterated.
I can’t help but think President Reagan is turning over in his grave.