This is a well-known metric to "estimate" your financial future. You can see the real-world use of this metric if you search for "FI/RE".
I agree with your comment about inflation and will update the post to include some tips on inflation calculation and its effects on net worth over the years.
Thank you
For anyone in the current world’s geopolitical reality who is more than 25 years from the Reaper’s ultimate embrace, and especially anyone who is likely to engage with a for-profit healthcare system in any significant manner, methinks the this may end up being a little optimistic.
That said this is more my cynicism about the likely financial headwinds barreling towards us all than a direct, or in any way mean-spirited, criticism of your work. I appreciate you taking the time to consider my comments, and especially taking the time to work at least inflation impact in as well.