I was working at Intel when they were fighting 10nm on 193nm lithography.
Yields were close to zero on way too many wafers
Yup, heard about that. From the outside, it appeared the main reason Intel was having so many problems was due to Not Invented Here syndrome. They did grudgingly buy that 2nm process that IBM developed but that didn’t go much of anywhere fast, and now people are doing sub 2nm pilot runs while Intel hasn’t got a working 2nm run of any kind.