I wonder whether these expensive things will ever be worthwhile. As with anything, operational experience beats a theoretical edge and if you can't afford to give your staff the training and experience because the machines are too damned expensive to risk and/or run, then any theoretical advantage they may once have had is easily lost.
Cheap and cheerful with plenty of time in the saddle is my recipe, else go completely unmanned and lose the need to drag around all those heavy life support systems... (like two engines!)