The physical constraint is money - which could be said anything. Could vehicle factories be more automated if we threw a gazillion dollars at it? Sure. Would it make economic sense? No. ROIC would be disatrous. No investor wants part of that.

This is the nuance that poster doesn’t understand. Given how much money thrown at it - we’re not even close. Who has the appetite to keep throwing more given they continually need to keep raising fresh money?