Is the Xbox controller being backwards/forwards compatible actually a feature? I thought that the only difference between them was the presence of a share button. Not to discount your point about it being bs that ps5 games require a new controller.
I guess the answer to your question about what hardware advantage the ps5 has it has to primarily be the controller. The new vibration and adaptive triggers are super engaging. I also personally prefer the way it feels to a ps4 one. Unfortunately I don’t have an Xbox so I can’t compare. Obviously that’s a personal preference thing though, it’s completely valid for you to dislike them.
That said, let’s be honest, I got it for the exclusive games.