Re: not (just) control
Agreed, Standards and interoperability are the key.
(Deleted long rambling piece about the history of how to run trains, except to say that I miss the days as a BR *passenger* being allowed to break up a long journey by getting off, wandering around somewhere I'd never visited before then getting on to a later train; compared to being fined for detraining a couple of stops early as the wife happened to be there with the car).