Chip fabs are extremely expensive. You basically need to invest $5B+ every two years just to stay up-to-date on technology, and then the same amount or more to

Chip fabs are extremely expensive. You basically need to invest $5B+ every two years just to stay up-to-date on technology, and then the same amount or more to do the necessary research and build the thing in the first place. (Reference in point: history of Globalfoundries)