Much cheaper to make it better at avoiding falling down the stairs (I've had two for years and they have never fallen down stairs). This is about as practical as the idea elsewhere in this topic that the roadster could avoid high speed collisions by boosting out of the way.
That's OK if it's just to save itself from dying in the event of a fall down the stairs. Should be infrequent!
Much cheaper to make it better at avoiding falling down the stairs (I've had two for years and they have never fallen down stairs). This is about as practical as the idea elsewhere in this topic that the roadster could avoid high speed collisions by boosting out of the way.