A problem for hackers

I think the author is missing a few big pieces. 1) why do we need 1.5 tons to move 85kg? we often move significantly more than 85kg and need to be able to adjust to the highest not lowest denominator, and the extra weight is in comforts, safety, etc.

2) a dreadful word 'compromise' when used in planning. Compromises should happen in implementation, when things need to be replaced or removed to meet engineering issues or deadlines. Why would you compromise when you are in the envisioning stage.

3) private/public transport - why not keep private transport but improve the efficiencies and footprint and improve public transport. Check out skytran.net. A great vision for public transport.