I pretty much agree with him.
The thing he was wrong about was the ipod gym analogy. Yes compared to other tasks AI calculations are minimal, but they still take valuable resources.
Check this link out: http://www.polygon.com/2014/3/17/5520290/battlefield-4-dragons-teeth-ballistic-shield
"We didn't have enough memory," Duffin said. "It added about a megabyte, but a megabyte on a 2006 console is a lot, so it didn't work out."
Both PS360 have about 512 MB minus their OS reserves, so with BF4 this essentially says the game runs at over 99.8% capacity as far as RAM. It's a similar situation with the whole console. Every little bit of power is used. Stronger machines can dedicate more resources to AI, even if it's a small change compared to everything else.







