Intel should seriously start a legit foundry business. Lots of big companies make the mistake of fighting inside the castle wall syndrome. When you are winning, you can't take TSMC's customers. When you are losing, they can take your customers. Just by probability, you will lose in the end.
You might say. Why now? we are behind. First, if Intel remain behind forever, all bets are off and intel fabs are dead. However, if Intel does recover and catch up, you want to exploit your winning to the fullest. Foundry business does take more than 1 day to build. So, double down the bet now is the way to go.