Is the eSRAM really that expensive in $ terms? Yield issues? I understood that SRAM was only really 'expensive' in that it chews up masses of die space (which

Is the eSRAM really that expensive in $ terms? Yield issues? I understood that SRAM was only really 'expensive' in that it chews up masses of die space (which isn't a bad bet going forward because there'll inevitably be a new version at some point with a smaller process)