Earlier quoted context omitted.
> That seems like a meaningful interpretation of "600 points" that applies to anyone It does apply to anyone, but it is more or less meaningful depending on where you start, so the meaningfulness isn't equivalent. It's as if you say you can double your money, but it only works once and with a value The idea that, say, Magnus could increase his chess playing abilities in 6 months (or even 6 years) to be able to beat t…
I often wonder if chess players have a natural "peak"/"optimal" age range in the way that professional athletes do. Being a thinking game that requires strong brain functionality combined with accumulated experience, I wonder if there is an age range that is best for most players. Trade offs may be something like in yours teens and early 20's your brain may have the most plasticity and ability to visualize (plan 10+…
I think there are a lot of confounders to consider. Though GMs like Anand show a drop in standard rating (https://ratings.fide.com/profile/5000017/chart), his blitz rating is near his all-time-high (ie. is his standard rating drop due to decreased mental performance or a shift in interest/focus to blitz?). Similarly, I suspect a lot of strong players who fall in the `2000<FIDE rating<2300` realize they may not be the next magnus and shift focus when/if they make the decision to pursue a career outside of professional chess.