Of course, it also adds cost to what already can be an expensive hobby, but just being able to run two trains on a single track without a collision is pretty cool.
The starkest problem is that no one knows how to reconnect spinal nerves and make them work again
"A child could do it" -- Leonard McCoy
The dial-up that I used did not have limits.
I'm going to assume here that was after 1982, when AT&T was broken up. Before that time there was only measured service (folks of a certain age will remember the Kafkaesque hell that was "message units". Unlimited local calling is a recent invention, and had the unfortunate timing to be introduced about the same time as the Hayes modem.
If you steal from one author it's plagiarism; if you steal from many it's research. -- Wilson Mizner