For more than a year during this ‘chip shortage, I’ve constantly heard, Elon Musk should build a chip fab. Build a chip fab! Build a chip Fab! Over and over again. It turns out that the chip shortage is actually a wafer shortage – there are not enough 200 mm (8 inch) wafers to make all the fiddly little chips that are needed for simpler things that need low power ‘chips’. Here’s the real story.
https://www.theregister.com/AMP/2022/04/12/chip_supply_2024/