“I work 90 hours a week”: world’s youngest self‑made female billionaire who replaced Taylor Swift shares her routine
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Who she is
Lucy Guo co‑founded Scale AI, left in 2018 with roughly a 5% stake, and rode its recent valuation surge to become the world’s youngest self‑made female billionaire, “replacing” Taylor Swift for the title.
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The quote and the claim
“I work 90 hours a week,” Guo says, arguing early‑stage founders “near impossible” to avoid such intensity; she likens it to the 996 culture (9 a.m. to 9 p.m., six days a week).
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The routine in practice
Wake 5:30 a.m., double or triple workouts, coffee, back‑to‑back work, lunch at the desk or skipped, late nights monitoring support, brief weekend social window, then back to work.
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Why she believes it
Guo frames long hours as reputation and speed advantages: founders answering customers directly, rapid product loops, and early‑phase “white glove” hustle before scale makes that impossible.
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The pushback
Critics warn that glorifying exhaustion fuels burnout and poorer decisions; they argue smarter scoping, focus blocks, and phased sprints can beat chronic overwork while preserving health and retention.
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The bigger debate
Her stance rekindles the culture clash: hustle‑first versus sustainable performance. The real question for builders isn’t hours alone, but what creates compounding outcomes without breaking teams.