I agree a lot with Dark here.
It is all about the competition and wanting to learn to be as good as others. Having a point to prove. There is none of that anymore.
Personally, my drive to play was through inspiration.
RR'ing someone thinking "I want to beat him...", coming back to ensure that happens. Now there is no drive, nothing to prove.
I guess a lot of older players feel the same, competitively.
Quite simply, we are less motivated, we move on.
It would be hard to get an oldschooler back - the competition is not there in my opinion. Hell, I would get into the playoffs every season if I was active, and I am no allrounder.
Sounds very negative, but in my opinion that is the state of the game. If people are still enjoying it, then that is brilliant but I've been there and done that like many others, and have no energy for more.