Presumably to ensure behaviour as near to identical as possible with earlier multi chip systems. Because they're fixed targets developers can end up coding righ

Presumably to ensure behaviour as near to identical as possible with earlier multi chip systems. Because they're fixed targets developers can end up coding right to the limits of console hardware, and end up with lots of reliance on exact timings etc. Xbox 360 was getting into the era where consoles had OSes and things should be abstracted through DirectX but I guess Microsoft decided the safest thing to do was create a clone with artificial slowdowns rather than risk games pushing the limit breaking. Nowadays consoles can change CPU / GPU microarchitectures seemingly without problems...