It's hard to build an inefficient electric motor, and I'd think the headline figure is the motor power rating. But even if we assume it's the power draw and th

It's hard to build an inefficient electric motor, and I'd think the headline figure is the motor power rating. But even if we assume it's the power draw and the motor itself is terribly inefficient, we're still talking 80% efficiency? Chain drive is 95% efficient if badly maintained, but then the human power loses that, too, so we don't need to consider it. So we're still talking 800W, which is 3-4 times as much as needed to sustain 20 mph on flat ground, and utterly out of range of any human for any time period beyond a minute. The power and speed limit of normal ebikes is a feature. It keeps us from making the same mistake we have with cars, which only ever got faster while driving discipline declined and were at any point beyond human ability anyway.