I’ve been using Boldin and Income Lab to model retirement for a my wife and I where we both get SS. Most couples can withdraw 5.5% very safely. Especially if you are willing to use risk based guardrails. For anyone not familiar with how guardrails work, you really need to because it allows you to spend more while guaranteeing you don’t run out of money. You just need to be willing to reduce spending if there is a large 30% drop in the markets.
Even the creator of the rule revised to 4.7% ..