I used to think that nailing a 3-statement model for a Series A fintech was the pinnacle of VC analysis. Then, in late 2022, I spent six sleepless weeks dissecting the unit economics for a niche B2B SaaS company, only to see their CAC balloon and burn rate spike post-investment due to market shifts I hadn't fully anticipated. I was wrong about just how quickly macroeconomic headwinds could cripple