When the service is very frequent then I agree multiple operators probably don't matter (less so than with buses in fact, because it's usually predictable whose train will arrive next). But the post I was responding to seemed to be suggesting that a potential passenger should have a choice of operators for all journeys, which by implication would not include inter-available tickets because there isn't such a thing in the supermarkets they were citing. That is, I consider, a nonsense.Do you have any figures to justify this assertion? In my experience of shorter journeys there is most commonly one operator. Accepting that there are nevertheless some routes with multiple operators, e.g. Stockport to Manchester with six, it still doesn't seem to unduly difficult or expensive to get an inter-available ticket and jump on the first train that presents itself.