If the US ever blocks Chinese ports the lights will be kept on. Although I'm sure that situation will end with a mushroom cloud.

It would be interesting to see how Carrier Strike groups fare against hypersonic weapons, as well as witnessing what the modern fighting doctrine is when there is no absolute air superiority.

Or massive industrial hacking that destroys enough transportation, farming, and supply chain integration that there is mass starvation when food delivery and production stalls - and it all comes crumbling down.