I think whatever the rules are, you'll always run into a barrier like the one you're describing. Longer distances, higher speed, more weight.... At some (arbit

I think whatever the rules are, you'll always run into a barrier like the one you're describing. Longer distances, higher speed, more weight.... At some (arbitrary) point there's a classification change that puts you in motorbike category. I think outer suburb commutes in large Australian cities will always push that category. As you say, you need more speed, range, suspension. These add weight, require more saftey measures. To cover these use cases, we probably need a new light/electric motorbike category, with its own rules.