Not realy pointless? You ever been on the motorway on a bike with a top speed of less that 100MPH? It is not a nice thing to do. Unlike a car you have alot of noise and vibration due to the very nature of how high the engine revs (And an electric engine will probably be just as bad). You needs a minimum top speed of 120MPH to be ok crusing at 70, and having a little left if you need it in an emergency.