The problem with GF is that they have been laying off their most experienced technologists based on pay and all they have left in increasing numbers are recent college grads who get promoted into principal engineer or management positions after only 2-3 years in the industry. So the problem solved are gone and all that is left are inexperienced engineers with inflated titles and a management team with a history of failing. Mubadala is trying to get rid of this operation, but other than EFK and Burlington, the human capital is not there. As for Fab8, it no longer is the most cutting edge fab with a production setup that is no longer being kept up to the latest standards to maximize volume output (which is already behind where should be in the industry).
This is not my post, but a reply to another thread on this board, @WklERnh-oyw . Tend to agree with the original poster.