I think the downvotes reflect the fact you are belittling this post when it is clearly brilliant. Your reasoning that "he doesn't keep the car on the road" mis

I think the downvotes reflect the fact you are belittling this post when it is clearly brilliant. Your reasoning that "he doesn't keep the car on the road" misses the point. He's demonstrating abstraction itself, and using a medium (reactive documents) that are really engaging. Focussing on the car itself, kind of misses the point. Calling his examples "dumb" just looks petty and deserves the downvotes, there is nothing about this that is "dumb"... it verges on "genius".