A 50cc version with a top speed of 36 MPH defies logic. If that's as fast as you can go, then you're going to have to pull over and yield to faster traffic from time-to-time. That's not so hard on a two-wheeled vehicle. That reverse-trike, on the other hand, is as wide as a small car, isn't it? Where is one supposed to pull over with that thing?
If it's wide enough to require a lane, then it needs to be fast enough to stay in one.
...Operating with impunity in the legal gray area between bicycles and motorcycles....