You’ve just broken a law of physics - no such thing as simultaneity- objects are separated in space-time. You can approximate simultaneous update on a single node but not in a distributed system. Time and space are involved.https://twitter.com/calebhelbling/status/969333324870311936 …
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In a fixed inertial reference frame you can get a pretty good approximation to simultaneity.
Interesting to think about chips travelling at (say) 100 km/hour relative to one another. The relativistic scaling sqrt(1-v^2/c^2) is roughly 1-4*10**15. So you drift a GHz clock cycle out of sync (very!) roughly once a month.
