i took another look at the corp presentation to try and better understand the excitment around M3.

From what I gather it's main job is allowing comminication to vertically stacked chips. Why do some think this is such an important Milestone? Vertically stacked chips would be part of the long term solution would it not? The short term solution is an interconnect chip.

Silicon isn't being stacked?? So why would the laser be important until all milestones are achieved?

What am I missing?