And why not? Presumably because it can't.
Wow, how can one pretent to know everything and write wrong post after wrong post, is beyond me.
That plane is a prototype!
That implies: it has no license to fly outside of private owned propety.
That implies: it can only fly below a certain height, I believe 300m
That also implies that it is remote controlled via radio, or in this case I believe: a cable!!
So: it can not fly with full speed as germany is a country where owning big pieces of land is problematic.
There you have it. However much you rant about it, this flying machine remains a close relative of the flying brick.
You might think so. But the engineers working on it don't think so.
I for my part bet on the engineers and not a random clueless