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There are some inventions from "last year" that would improve power consumption on 6 orders of magnitude, but still only do under 1 meter transfers... around 800-1,6kTb things... per frequency. So, multimode fibers of that, 16x that.. for a few meters... things... (maybe 10 meters)

km stuff... single mode will make a huge difference at these power consumptions. Nothing comparable to "home computers" but still very promising compared with what the industry has.