Earlier quoted context omitted.
The biggest showstopper for me on this is the hugely disappointing top speed (40 km/h). I'm an alpine skier (ex-racer) and the only times I go that slow is on transport stages. This thing literally wouldn't be able to keep up with Usain Bolt running the 100m. It needs at least twice the top speed.
Usain Bolt does around 38 km/h
Edit: he accelerates from standstill at 9.5 m/s^2. I couldn't find data on what drones do.