It'd be good to see the age trends of major Hollywood executives too; I can't imagine they were ever especially young but are we possibly just having close to z

It'd be good to see the age trends of major Hollywood executives too; I can't imagine they were ever especially young but are we possibly just having close to zero new blood coming in over the last few decades so the ones making the decisions are still the ones who decided all these names should be stars in the first place. Beyond that a lot of it would be that society has changed in a manner that it's just very hard to have a movie star today that has the level of widespread fame that a Tom Cruise or Brad Pitt attained in the 90s. You've also got a lot more actors who know how to handle their careers long enough to protect their status; there's a template the likes of Robert Redford built out by getting so involved in the overall process that still helps a lot.