According to boring company: Many of the speed improvements come from the design of the system. Smaller tunnels, automatic stone placement, removal of dirt.
Likewise with the Boring Company. Of course they still need to prove themselves, but the factors that work in their favour in tunnel construction are the same ones that favoured SpaceX.
ULA and the established rocket manufacturers made big profits off the fact that launching rockets is stupidly expensive. That meant their profit margins ended up being stupidly large quantities of money. Musk’s contention on big tunnelling projects is that big construction companies have similar incentives not to reduce the costs of tunnelling. However Musk as an outsider is free to innovate and develop the engineering and technology because he doesn’t have big fat profits he’s already tied to.
All these features already exists in current and older machines. And the rocket market is different from the boring market.
Actually its not. TBMs are crazy expensive as of now. Any major disruption in price will be a total game changer for public transit systems.
Has the reused items proven reliable and profitable in he long run, which was the only reason others were not doing the same...
They claimed what was technically impossible?
Do you have a citation for that?
These things have existed for a century now. The fact that no one tried and it took a person with money from early dot com start up exit means others goofed up enormously.
Anybody could have tried. They didn't. Pulling down other peoples achievements because one didn't try the obvious themselves already reeks of envy.