So basically every project worth doing. Obviously it would be expensive it’s train travel. Any kinda project costs a fuck tonne. Not specific to Hyperloop.

That’s fair enough. I suppose any kind of improvement on maglev would be useful. Just bumping trains to 300 would have some ability to compete with air travel

Yeah that would be very expensive and difficult. However kinda similar to if a plane fails.

All others seem fair enough. Technology moving past is kinda silly. That’s like saying don’t make trains as new tech might come and then it’s a waste.