Comment Re:Exhaust (Score 1) 221
They have never put it in a production machine. And as a steam turbine engineer, I can say they probably never will. The engineering problems are too difficult to solve in a cost-effective and worthwhile manner for small vehicles. Trains, large trucks, and busses? Maybe. But not in passenger vehicles.
I agree with you that humankind has reached the limits of technological advancement about a decade ago.