In the latest MSA delineations released by the White House, Birmingham re-added Walker County (~65,000) to the metro. That's a good bump, but it's also going to make the metro start shedding people given the former 6 county configuration only grew by a small, small amoun in the most recent estimate.
EDIT: Additionally, the metro dropped Hoover as a primary city. Now it's just the Birmingham Metropolitan Area.
https://www.whitehouse.gov/wp-conten...etin-23-01.pdf