Earlier quoted context omitted.
> unless there are serious advances in rock boring techniques I'm pretty sure Elon Musk doesn't enter a market unless he intends to do just that. Edit: I got downvoted a bit but it is his MO. He takes things that are expensive and makes them cheaper. For what it's worth though, I do think the tunnels in that video are ridiculous.
And concrete production? And underground hazard detection? And coordination with city infrastructure? And...
And battery production? And crash test safety? And coordination with NHTSA?