No big surprise, but oh well. Would have been cool. Neat test setup, though!
It was bound to happen eventually. A group of researchers that may actually be competent and well-funded is investigating alternative thrust concepts. This includes our favorite, the
WTF-thrusterEM-drive, as well as something called a Mach-Effect thruster. The results, presented at Space Propulsion 2018, are pretty much as expected: a big fat meh.
https://arstechnica.com/science/2018/05/nasas-em-drive-is-a-magnetic-wtf-thruster/