I agree with Mackintosh. It doesnt matter if its unrealistic. The realistic way is already implemented. Who wants to use it use it. The option to place the train or remove (like Locomotion) or simply replace to a new one (like RRT2) is another option for those who want to use.
Could be just replace to new one. Simple as that, nothing will be changed in the game, just a UI button and a code to reset vehicle life and withdraw the money.
I like realistic and I like the challenge to need to make the train go all the way to the depot etc. But not always. Sometimes I just want to worry about other things and with a fleet of over 100 vehicles, its just not possible to be so picky.
