I think that becoming a "grandmaster" of anything is probably outside of the scope of this research as that is a whole other bucket of worms (probably). And wh

I think that becoming a "grandmaster" of anything is probably outside of the scope of this research as that is a whole other bucket of worms (probably). And who knows how the prevailing wisdom that you can't teach an old dog new tricks affected the number of people who chose to try to become a grandmaster? Maybe your priorities change when you are older and it has nothing or less to do with raw ability?