B only applies to relatively wealthy, childless people living close to where they work.

A is a straw man. There’s no innovation there. We need to redesign roads so that they are invisible and uncongestible. We either have to do personal air travel, which we don’t have the power density for yet or underground which is looking more promising. All people moving cars need to be electric and self driving. A car should be like a universal elevator, just get in and push a button. That’s the best option, 0 time dedicated to piloting your body through space and you’re able to live anywhere and work anywhere.