Tunneling technology is already a very mature field. TBC hasn't revolutionized anything with regards to tunneling tech.
I dunno why you would say the point is the technology. The point is obviously building out alternative means of transit to help decongest above-the-ground roadways. Which this fails to demonstrate.
Maybe you should read them. Neither remotely supports the point you're trying to make.
Unless all you're trying to say is "people have been digging tunnels for a while". Which is about as useful as pointing out that people had been riding horses for a while so transportation was probably as efficient as it was going to get.
You have a good way to signal that i'm wrong, and a bad way. The good way is to quote the paragraph you think supports your point. You're choosing the bad way, which is pretty solid evidence that you're the fool pretending to knowledge, and you know it.
... to figure out how the current technology works, and determine how to make it faster.
I'm not a Musk apologist. The idea of underground freeways in tiny tunnels is not good, but real innovation generally comes from grinding, evolutionary progress. You need to iterate to figure out what works and what doesn't work.
It's a used, small-scale boring machine. Literally all the innovations Elon is trying to claim aren't necessary for boring machines that small because the cost efficiencies gained are rounding errors.
Small boring machines work differently from big boring machines. It's like the difference between an toy RC car and...a Tesla. Other than using batteries and motors they're not comparable.
What technology? I'm a fan of Musk's work but this whole venture seems like a pet project for a fantasy he has of bypassing LA traffic in a private billionaire tunnel. It's not clear they've identified an opportunity for some real technological or production advantages as with SpaceX and Tesla.
I dunno why you would say the point is the technology. The point is obviously building out alternative means of transit to help decongest above-the-ground roadways. Which this fails to demonstrate.