[soyiuz]

> The dramatically reduced costs of infrastructure for constructing mounted tubes on pylons, with each section being a fungible, mass produced item, makes rail obsolete.

This makes no sense. The "mounted tubes on pylons" contain rails inside and therefore are MORE not less expensive than just "rails mounted on pylons," which we already have. A more complex rail does not make simple rail obsolete. Nor does it beat it on fungibility, cost, or mass production. Where are you getting these "dramatically reduced costs"?