KRTH purged most of their “old” talent around 2013-2015 sans Gary Bryan. Some were retirements, others were released due to being associated with the station’s “old” sound they were moving away from. It didn’t seem as obvious of a change as it does with WOGL, though. When “Coop” was added to WOGL I thought he was quite young for the station, so they may have been planning this for a while or were hoping someone younger in the morning drive time would help.
I feel like a station like CBS-FM in a market like NYC is going to be less affected by having older jocks.