Earlier quoted context omitted.
Nationalizing them would be a disaster. They were deeply unprofitable until the federal government de-nationalized them after it had nationalized them and practically ruined them in the process of that nationalization. Let's not ruin what good things there are.
You can nationalize the infrastructure without nationalizing the operations upon it. Many other countries use a system where one government-related entity manages in the infrastructure, and many private companies can pay to operate rail services on that infrastructure. This would actually allow market competition instead of geographic monopolies.
That was the intention of my post.