What I found fascinating was when I zoomed in on my hometown area (Canton, OH area) the interactive "... With Parents in the X Percentile, ends up on average in

What I found fascinating was when I zoomed in on my hometown area (Canton, OH area) the interactive "... With Parents in the X Percentile, ends up on average in the Y Percentile" flattens out as I raised the parent's percentile and then started to decrease. So on average children born into rich families decline by this metric (at least in this one area).