I would not be so optimistic on Intel foundry. Chip manufacturing is not a science job (do things in a more accurate approach), instead, it's an engineering and management business (TSMC did not invent anything to produce wafers): how to deliver a new node with good yields, meet customer's product pace, make sure everything tight and cheap... etc. If one 2nm 12" wafer from TSMC costs $25000, it's difficult to image Intel could cut the price below $35000 (assume follows the EUV, fin, gaa .... schemes). => How could people accept an iphone price-tag at $3000? (one wireless telephone costs $3000 ??? really????, well I guess I am cheap.)
the business gross income of Intel was not from the foundry. foundry is a money burging thing. If you can not have 2 major clients, you are NOT good. The best hope might be building dedicated fabs for ChatGPT or Musk. (Altman said he need dedicated fabs). Of course this take at least 3+ years for a new major node. but they also said TSMC salary are not sky high ......
** TSMC 2nm wafer price :
https://www.tomshardware.com/news/tsmc-expected-to-charge-25000usd-per-2nm-wafer