It's kind of the same issue. Retooling takes time and investment. Then when it's no longer needed, they have to switch back. It's quite a bit of waste. It seems to make more sense to let China crowd their factories and take on the risks of being 100% in production and we just streamline the customs. Most air & sea lanes stayed open, and there's definitely spare passenger craft to be utilized. Personally I'd rather utilize idle industries in their typical specialization than to retrain and revamp.