@wolf480pl @mikoto eh, it's still feasible, we've learned to push much higher bandwidths over much longer links, albeit for serial connections
that's kinda the whole problem with memory, it's an extremely wide parallel bus and routing that on a PCB while maintaining ludicrous speeds is the actual challenge
the width of the memory bus on that thing is mid-range GPU tier, equivalent to quad channel DIMMs and also to what apple ships with their mac SoPs
I imagine fitting two LPCAMM2 modules (they're apparently 128 bit wide) on a mini ITX board with such a huge chip might have been a challenge, or some other factor kept them from doing it