There were a lot of computer graphics cards manufacturers back in the 90's. Nvidia survived amongst the whole pack of them. 3dfx, Matrox, S3, ATI, Cirrus. How much of that is soley due to Jenson vs outside factors outside of his control, only he really knows, but I think her deserves a bit more credit than right place right time. CUDA was a very expensive investment with zero guarantee of payoff. The market could have gone an entirely different way and Nvidia would have failed.