I don't see GlobalFoundries as a realistic competitor to TSMC. Also CERN's needs cannot be compared to the needs of Amazon, Apple, Microsoft, Facebook and the likes. That right there is a huge chunk of the world's economy and they all rely on TSMC directly or indirectly.

My guess would be this is more about diversifying. I think it makes a lot of sense to have factories in the US, Europe and Asia, especially given China's stance on Taiwan.