You're right — if someone wants a super precise FIRE date, it gets tricky with volatility and short time horizons. We considered adding a range around the retirement date using different return scenarios, but some users found that too complex and preferred the current simplicity.

That said, we still believe it’s useful to focus on what is in your control: contributing to the right accounts in the right order, investing wisely, and minimizing fees. Those fundamentals work in any market, and over time, the ups and downs tend to average out.

To add another perspective:

Anecdotally, we have found we have two personas: 1) Those early in their financial independence journey. They want to know what to do next to accumulate wealth 2) Those towards the end have saved and accumulated. Their questions are 'do I have enough'

The second persona are running more plans more frequently because the market volatility (and job market volatility) has made them want to check and check again if they have enough.