It is well documented that the Pittsburgh Steelers have a lot of money tied up in their defense. They have some of the highest paid players in the league at their positions such as OLB T.J. Watt and S Minkah Fitzpatrick. As the league has shifted to being dominated by offense, this approach has drawn criticism from certain pundits, but the Steelers are in the middle of a total overhaul on the offensive side of the ball.
ESPN analyst Bill Barnwell posted a list on X of all teams sorted by average age and broke it down by offense age, defense age, and total team age.