Investor: vibes investing on aura and big TAMs is a sure path to huge losses

Sethwinterroth · x · 2026-10-03

Investor Seth Winterroth argues that AI startups require underwriting years of qualitative signal before generating any revenue — the J-curve is brutal and production hell is the great equalizer.

He warns that SaaS investors who abandoned triple-triple-double-double frameworks for 'vibes investing' based on aura and big TAMs are on a sure path to losing massive amounts of money.

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