I saw this thing on the ground at the Avalon Airshow and it looked impressive and stuff, but for a long time I have had this 'vision' that any kind of 'compact' air / road vehicle able to be used to 'commute' or used around population centres and around people often would have some kind of ducted powerplant to dramatically increase safety but I understand such systems are very inefficient compared to open-air rotors / props. The Lithium design seems to be a good approach but it has those big wings.
I imagine an airframe-mounted parachute or some kind of pop-out airbag balloon could provide a degree of safety in the case of an engine failure but would increase the weight too much. (In the movie Blade Runner 2049 the Spinner had some kind of burst of air to cushion the touchdown at the last moment which was interesting.)
The other thing is flying it... I've thought by this time we could implement a flight control system which is essentially an autopilot, or dare I say some kind of AI, which keeps the aircraft stable at all times for you, and simply does for you what you command it to do.