Re: 236 carriages?
I think they use a different term in the USA, but it really depends which audience The Register hacks are writing for. The jargon can soon get complicated.
Even in Britain, with the rather tight loading gauge, 100 tonnes gross per hopper wagon is possible. That is going to be a huge train, with multiple locomotive units linked by a control circuit to get enough track-adhesion to move it. Even with a human driver, reliable control operation is going to be tricky. Having the driver in a control centre in Perth might not be so dramatic a jump.