The PlayStation 5 Is Still A Ways Off - Jason Schreier Kotaku

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HollyGamer said:
They could but what for, the primary function of early SDK is to test the possibility outcome of performance close to the target. If they tried to build a modified vega costume then it will take times  just for the prototype. I bet they prefer using pure Vega chip for now.

Not just performance. But features.

HollyGamer said:

 

That's possible if SONY in hurry and run with time, but there is no indication that SONY want to release PS5 soon. They prefer waiting for the next GCN architecture to come.

Vega or Navi isn't next gen though.

HollyGamer said:

Then you  agree ,Vega and Navi are different. Even thou we know that they are using a similar GCN but have different quality and optimization, let alone die size.

They have allot that is going to be the same.

HollyGamer said:

But for now it still another decade to worry for that, probably after we achieved 5 nm?

It's an issue now. Hence threadripper.

HollyGamer said:
No , I am talking about the benefit of GCN that they mentioned in the GPU road map, which is scalability 

Spelling error. I of course meant scalability not availability.
AMD builds it's GPU in blocks based on library's that it scales upwards and downwards. It's been a design emphasis for years.