Not really, the terminal velocity will limit it soon. The reason for the 400ft is more that general aviation is permitted from 500ft upwards (well, they must ke

Not really, the terminal velocity will limit it soon. The reason for the 400ft is more that general aviation is permitted from 500ft upwards (well, they must keep 500ft clearance from ground and buildings in all directions) and they can't coexist with drones. Especially automated ones. Also it can be mitigated by the shape of the shell, have a parachute etc.