I don't mind. Also, we have anti-gravity technology but we still use liquid fuel rocket engines? lol 

The engineer in my head keeps nagging at me sorry. I was just thinking, if we have the tech to replicate gravitational forces and fusion reactors couldn't we implement that into a launch system? The thing about Ion Propulsion is that it has high specific impulse but extremely low thrust so we would be sitting in cryogenic sleep for years before we got anywhere significant XD. 

Yup VASIMR engines ionize hydrogen or sometimes helium and push it through a magnetic field that confines it into a jet creating thrust. It has generates plenty of thrust and retains a decent specific impulse which translates to more DeltaV than we will ever need and since both fuel sources are extremely abundant in space we would die of old age before we ran out of fuel. 

I don't know. I try my best not to be nitpicky but I do like to keep in the realm of plausibility because it means I can use my own knowledge as a reference so I don't have to make up entire theoretical systems on the fly.