Ask yourself this, if Tesla is so good at making autonomous driving software, and can make the cheapest batteries, and can automate manufacturing more than anyone deemed possible, why do they not sell these. Why do they target only half a million cars a year while they could completely take over multiple industries by becoming tier-1 supplier to various manufacturers? It is to maintain hype, the real truth is somewhat humbling.

The same applies to boring company, if they can dig tunnels so cheaply, they would become tbm suppliers or contractors, not an end to end solution.