Bletchleyite
Veteran Member
Having stood waiting in the ticket office at Crayford (z6) on many occasions hearing people ask for day travelcards, I can assure you that they aren't *only* used for outboundary tickets.
There are odd use-cases like enthusiasts wanting to ride round the Tube all day without passing through a barrier, but I don't see much case for the paper inboundary ODTC to continue to exist, and certainly not for money to be spent keeping magstripe readers going for it. Indeed, I think LU could quite well abolish paper ticketing entirely without much of a penalty provided the TVMs could instead dispense Oyster cards, which I believe they already can, and take them back to return the deposit as well.
I reckon most people buying them now are doing so because they always did.
If LU abolished them unilaterally, the TOCs would have their hands forced to sort their shop out, too.