Geez, and I was surprised to see 400Gbps QDR optics hitting the mainstream. Even if we double the data rate every few of years (as we have been, 10Gbps, 25Gbps, 40Gbps, 100Gbps, 200Gbps, 400Gbps, 800Gbps, I expect it will continue), we are at least 10 full cycles off from realizing those kinds of speeds, or 30-40 years?

Edit: since they are multiplexing, it almost seems like this is DWDM, on 4 optics, and combined into a single datastream. That means is probably more attainable sooner. Seems similar to just adding more cores (or lanes like in current QDR optics).