If FlexSim had a train/rail industry library/module/objects/templates it would be more attractive to people looking for a rail industry simulation tool. I worked on 3 sales in the last 2 years that resulted in them buying AnyLogic for their rail module.
I know FlexSim has everything needed for modeling very well in the rail industry with the AVG module and ProcessFlow but unfortunately, when someone is shopping, being shown the capabilities is not the same as having them neatly packaged with the correct object shapes, names and parameters.