> Rare earth metals are in the dirt around the world.

They are. The problem is, the machinery to extract and refine them, and especially to make them into chips, takes years to build. We're looking at a time horizon of almost a decade if you include planning, permits and R&D.

And given that almost everyone but the AI bros expects the AI bubble to burst rather sooner than later (given that the interweb of funding and deals more resembles the Habsburg family tree than anything healthy) and the semiconductor industry is infamous for pretty toxic supply/demand boom-bust cycles, they are all preferring to err on the side of caution - particularly as we're not talking about single billion dollar amounts any more. TSMC Arizona is projected to cost 165 billion dollars [1] - other than the US government and cash-flush Apple, I don't even know anyone able, much less willing to finance such a project under the current conditions.

Apple at least can make use of TSMCs fab capacity when the AI bros go bust...

[1] https://www.tsmc.com/static/abouttsmcaz/index.htm