This is a very cool update. I'd be interested in whether he suggests changing the draw each year based on the then-current CAPE ratio and inflation or only using it for the first year.

Also, I think a much safer approach is the so-called guardrail approach, where is your draw is more than 20% higher or lower than your target percentage die to market downs or ups, you reduce our increase, respectively, your draw by 10% for that year.