The move of the steel industry down south was for cheaper land, lower wages and to rebuild the plants that were so old the only option was to tear them down instead of modernize on-site in Pittsburgh. Your comment an observation of the result which started in the 60s or a bit earlier.
Kodak takes a huge hit during a layoff. They pay a worker up to 2 years full pay depending on length of service, plus they pay for retraining in a new trade and they continue health benefits for a specified time. In addition, employees are given a place (office space) to prepare resumes for obtaining reemployment for about 90 days. This amounts to millions of dollars.