Just to have rolling stock physics that reflect real life would be enough . BTW I am all in favor of prototypical "pumping up the air" times, and brakes that don't let you immediately re-apply them after letting them off without that period of pumping them up again.
But I don't think we need to add all prototypical practices (airbrake test immediately before heading out or going down a long grade anyone?). There are numerous little prototype activities we don't do in RW (or MSTS, or many model railroaders) because they just don't add much to the experience.
You have to draw a line somewhere or else it all devolves into too much work and not enough fun.
