[GuB-42]

I am fine with the downvotes but if that because I am wrong, please tell me how.

I have yet to see a convincing simulation of how a would be hyperloop would behave of one were to poke a hole in it. And by convincing situations, I mean one with an appropriate model, that is a very long tube engineered to hold a vacuum.

An then you can downvote this post too, a good explanation is well worth a few karma points :)

[bluGill]

We get the same about airplanes despite demonstration that it doesn't happen. Material science is far enough along to avoid anything with problems.

of course cost is something we can also make good estimates of.