Was it ever any different though? Was there ever an era where a few young managers all came through at once and had decent success? 5-10 years in a job was the norm for managers until the PL era so I really never understood where this idea that younger managers should be making the breakthrough regularly came from.
Even then we see younger managers like Howe and Dyche now and ten years ago that was guys like Aidy Boothroyd and fifteen years back it was David Moyes. And when those guys were about we had the older generation like Joe Royle or Peter Reid switching about between clubs…they just generally got longer which is why it feels a bit more pronounced nowadays but I don’t think its ever really been any different in reality.