www.cfiresim.com is also a great resource. It does monte carlo back testing of your probability of success, with success defined as "not running out of money"

www.cfiresim.com is also a great resource. It does monte carlo back testing of your probability of success, with success defined as "not running out of money" on a given timeline. A big takeaway (adjustable on "Spending Plan") is "if you can reduce your expenses modestly during a downturn in retirement, your chance of success is much higher". Sequence of Returns risk is also shown pretty well. The failure instances are commonly when your backtest year is immediately prior to a recession or The Great Depression.