If Navi is, as we believe, a modular system where smaller components can be put together on an interposer, then there isn't any reason for AMD not to release the whole stack at once. As far as I can tell, the only thing that would be holding back AMD setting whatever performance level that they want is the total power consumption. Actually they would be able to pretty much dial in any level of performance that they want to match NV from the smallest to the largest of the Volta offerings.
Ya you're right I focused a little too much on the current high end low end alternation I forgot that he's navi is supposed to be modular and should be quite interesting.
Is it feasible financially for amd to do so though? Or even worth it to abandon what they're currently doing?
Navi 11 releases first focusing on modular navi bringing all of the power savings side of the story (Polaris 11, what's clearly going to be Vega 11,etc.) and then navi 10 further improve and deliver the best and highest performance to the business consumer who will pay the largest?
May be possible for amd to release the whole lineup, but still could be good reasons why they don't such as the scenario I laid out.
Fiji and Vega could just be two duds before the modular chip similar to Ryzen in modularity is out.