From Twitter
If China has decided to invade Taiwan, I expect this will be one of the cornerstones of their strategy: mutually assured economic destruction. U.S. tries to intervene? China can cut off the U.S. from their supply of rare earths & other critical minerals. https://foreignpolicy.com/2022/11/22/critical-minerals-resources-us-china-competition-cold-war-supply-chains/
From Twitter
Jim Kennedy has good rants on this, though they tend to be light on details. He says China now has "the equivalent of five national laboratories that do nothing but rare earths." https://www.youtube.com/watch?v=dbbifeLRHIA