You think Mark Cerny only made Knack? Look up his resume. More than half the industry uses his game development methods.
How did Sony get it right?
The results. XSX's GPU advantage has been nullified by a much more cost-effective solution, so much so that MS has been giving clarifications and controlling damage that "we are working with our partners to resolve the issues" lol. PS5's GPU has been outperforming XSX's at less cost, that's an advantage. I thought after 12 > 10, Xbox fans would be better at Math
And it's a HUGE advantage when you see that PS5 has significant advantages in other areas because of that GPU efficiency, e.g., data throughput, SSD, and controller.
Lastly, because of that cost-effective GPU solution, Sony managed to make the entire PS5 at a cheaper cost than XSX (despite having advantages in other areas). The last reported BOM was $450 for PS5 and $480 for XSX.
Where's the advantage of XSX after spending so much money?