Low latency is like a car with an autonomy of 20000km (12000 miles) but a speed limit of 80km/h (50mph) : pretty slow (low throughput) but no annoying pauses wh

Low latency is like a car with an autonomy of 20000km (12000 miles) but a speed limit of 80km/h (50mph) : pretty slow (low throughput) but no annoying pauses when you drive from NYC to SF. If you had a bus like this, combined with autonomous self-driving, it might revolutionize travel in the US! Of course you usually don't need that much speed and you'll end up having a lot of pauses on your SF to NYC trip, but you'll get there a lot quicker because you'll be able to drive at 70 mph all the time. And when you arrive, all of the driving and stopping will leave you fatigued. The steady-state travel enabled by the robot nuclear super-bus would let people travel in sleeper compartments! Which model is better ? Clearly the 2nd! I don't know but all the car I know are the second kind. What about GCs ? I don't know, but the majority of modern GC are the second kind … You seem to be leaning rather heavily on the adjective "modern." Because if you use the colloquial definition of the term, there are a number of currently maintained and used GC that aren't the 2nd kind.