Lean, Fat and Coast FIRE are not teams. They are different answers to two questions: what your life costs, and when you stop contributing. Here is the math.
Inflation never touches your balance. It shrinks what that balance can do, and many money rules are written in dollars that keep shrinking. Here is how it works.
Smart people are not automatically good with money. The gap between what a strategy returns and what its investors return is behavioral, not intellectual.
What you can stand emotionally and what your finances can absorb are two different numbers. Confusing them is why good plans get abandoned at the worst moment.