Keith RaboisvsSteve Ballmer
1 documented disagreement.
Founder-product-fit vs product-market-fit as primary
Gives operators a vocabulary for CEO transitions and category pivots that PMF-only framing cannot reach.
- Steve Ballmer
- Product-market fit is loud. Founder-product fit is quiet — but it's the one that lasts.
- Keith Rabois
- The only signal that matters at the seed stage is product-market fit — everything else follows.