The original stated goal was to 10x the speed of existing tunnel boring machines by bringing up the cutting head RPMs, automating liner installation, and speeding up spoil removal with electric sleds. Which would seem like a good bet, except that there are a million other bottlenecks to the process. On top of that, it doesn't seem like they even solved their core problems.
It would be cool if they'd post a postmortem or something, but I get the impression that reporting bad news is a good way to get fired in an Elon-run organization.
It would be cool if they'd post a postmortem or something, but I get the impression that reporting bad news is a good way to get fired in an Elon-run organization.