What exactly in my reply are you referring to? I wasn't implying anything about above ground tunnels, construction doesn't get cheaper or easier when you put the tunnels under ground, in fact the opposite is true.
You said train and purchasing land: 1) these tunnels aren't for trains, and 2) you don't need to purchase land in most cases for tunnels - you need a license from the government.
Your comments continue to tell me you don't know any details about The Boring Company's efforts, where the boring machine they've designed so far - from having bought 3 different machines and did 3 test tunnels to study the machines, to then design their own boring machine - has apparently reached around a 15x speed improvement, essentially meaning a 15x cost reduction from the standard cost associated with digging tunnels.
Your attitude is akin to saying launching rockets into space can't get any cheaper, meanwhile Elon with SpaceX has proven that you can get the cost down from rocket launches from $60 million per launch down to $6 million per launch by having successfully creating re-usable rockets.
Re: the complexity of Hyperloop specifically needing a near-vacuum - Do you understand Elon has that expertise at his fingertips with SpaceX engineers? And that they've clearly proven they're competent and able at understanding and safely designing for physics?
Your comments continue to tell me you don't know any details about The Boring Company's efforts, where the boring machine they've designed so far - from having bought 3 different machines and did 3 test tunnels to study the machines, to then design their own boring machine - has apparently reached around a 15x speed improvement, essentially meaning a 15x cost reduction from the standard cost associated with digging tunnels.
Your attitude is akin to saying launching rockets into space can't get any cheaper, meanwhile Elon with SpaceX has proven that you can get the cost down from rocket launches from $60 million per launch down to $6 million per launch by having successfully creating re-usable rockets.
Re: the complexity of Hyperloop specifically needing a near-vacuum - Do you understand Elon has that expertise at his fingertips with SpaceX engineers? And that they've clearly proven they're competent and able at understanding and safely designing for physics?
Edit to add: also see my comment here for more insight - https://news.ycombinator.com/item?id=23179150