"Sustainability" is a myth. ALL power comes from increasing entropy - in stars at the very least. Thorium is sufficient to power the entire world at US standards for thousands of years. And, since it is in the magma of the core, at a rate which could support several tens of billions at that power level.
And perhaps silica is available in great quantities, but lithium is not, and silver and copper - just the copper alone to take the industrialized world to Wind and Solar would leave every copper mine empty, denuded, not even tailings to reprocess.