Yes. You know the history well. I think the next time our air power will be our winning card. It would be hard to stop the Nork infantry. We only have 30K U.S. Army troops backing up the South Koreans.
But one thing that could be a difference maker is that it’s not entirely clear how well fed the North Korean army is. If they launch an attack with minimal food supplies and the soldiers are already hungry... they could lose the will to fight. Punishing and relentless air attacks on Nork supply lines will be key.
The ROK's will grind up the NKPA and spit it out. The Korean War was a debacle because we denied heavy weaponry to the ROK's fearing (rightly or not) that they would invade the North and drag us into a war with the Soviet Union. If they had received the proper weaponry and training, the ROK's could conceivably have held their ground. Today, it's no contest. ROK materiel superiority simply dwarfs its NKPA counterpart. The ROK's might lose Seoul, because it's right across the border, but they would establish air supremacy almost immediately and interdict NKPA supplies coming south, thereby stopping the invasion in its tracks.