I agree, I was trying to examine how plausible it was from a very simplistic model, which is why I said "ignoring other very important constraints". It sounded

I agree, I was trying to examine how plausible it was from a very simplistic model, which is why I said "ignoring other very important constraints". It sounded implausible on the face of it, as it might require cars to be leaving the assembly line at freeway speeds, but it wasn't quite that bad in reality. There are plenty of other things which make it very unlikely/implausible though, such as market demand, as you note.