I really liked the way you arranged the content of this post in order :-)
People just sometimes make long posts and type sentence of after sentence without caring to make sure that they at least make it presentable.
Your post makes sense as it is clearly spaced out between stages of development of the platform. That makes it so much more readable and understandable. People don't say this but thanks for that.
Okay coming to the main topic. I was studying Robotics a while ago and we had to design a lot of mechanical components. The passive designing is far more easier but when it comes to alignment of different parts and making sure that the whole body of the robot is a working fluently - it's a complete other level of difficulty. Requires a lot of innovative imagination on the designer's part. Of course it gets easier with experience but that doesn't make it any less impressive. Combined with rendering and animation, the smallest of machines can become a headache.
So the fact that the whole automobiles with real life functionality are included in the platform indicates a certain technical proficiency on part of the dev team.
Hats off.......