That just what I was going to say, but probably put better. Another important metric for electric propulsion is how reliable they are - that is how long you ca

That just what I was going to say, but probably put better. Another important metric for electric propulsion is how reliable they are - that is how long you can run them before they burn out. The fact that they're eroding the cathode intentionally might mean this form of propulsion could do well on that metric but only testing will tell.