PSA on train stations
I was today years old, when I learnt that train stations work much closer to RL than other similar games I have played (factorio, satisfatory).
That is, 1 (loose) loader can load a whole train of (loose) cargo carriages. It just takes a bit longer. When a carriage is full, the train will move so that it is filling the next carriage can be filled.
This lets you save on space and on building materials as station loaders aren't cheap. Just make sure there's enough track either side of the station so the train can move to fill every carriage.