I think it also shows that fabs who only have one customer (ie, Intel) aren't as competitive because they can't provide as much scale and are more sensitive to that customer's success.

Intel's fab would be doing much better if it spun it out a while ago and was making Intel, Nvidia, and Apple chips right now.

If Intel's fabs has been spun out and operating at arms length from Intel's chip design side, then Intel's fabs would be dead. The guaranteed volume from manufacturing Intel's CPUs is all that's been keeping their fab side going. If they had to depend on customers who were actually sane and free to take their business elsewhere, Intel's fabs would have long since chased off all their customers with unfulfilled promises that next time they'll have a working process.

What Intel process from the last decade would have been enticing to Nvidia or Apple?