It's possible that the chipset will only most of its lane increase in the manner you describe. That is, with an increase in the uplink between the chipset and the CPU. Honestly, I'd like to see it split out that way. Come to think of it, that's a logical way to do it as it overcomes a major platform short coming while still leaving the usable lane count lower, which still keeps HEDT right where it is. We are likely to see the same thing happen with X399's successor.