That has always been the assumption anyway. Currently nobody actually knows the condition of their conventional artillery or how much ammo they really have. We don't even really know their soldiers' or military command's willingness to fight a prolonged war. Kim of course doesn't run the country, there's no mythology surrounding him for the military leadership, and they're not going to fight a battle to the death for him.
I agree that North Korea can outlay a large amount of artillery fire immediately, but I think South Korea + the US can wipe out 90% of it within the first week of combat. After that it becomes strictly a ground war for the north. I also believe a lot less people will die in the south than typically proclaimed, and South Korea can rebuild quickly - meanwhile, the North Korean regime will be finished forever.
I agree that North Korea can outlay a large amount of artillery fire immediately, but I think South Korea + the US can wipe out 90% of it within the first week of combat. After that it becomes strictly a ground war for the north. I also believe a lot less people will die in the south than typically proclaimed, and South Korea can rebuild quickly - meanwhile, the North Korean regime will be finished forever.