No, they wouldn't. That wouldn't even build them one fab, let alone summon all of the talent and supply chain out of thin air.

Lol? No, wtf

Also 8bn is like 1/3 of modern fab

I’m not convinced either of them would even want to.

AMD used to have fabs - they spun them off a long time ago as GlobalFoundries. They’re no longer competitive with TSMC, Samsung, or even Intel for modern nodes.