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It's not digital only, I have a physical version. Whether or not you can get a card depends on your locality. Nevertheless, I don't understand why it's so much more inconvenient to understand and purchase compared to the 9 euro ticket. With that you could get a paper ticket or buy on app and the rules for what it did were consistent everywhere.

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The physical card has a chip, which is digital.

The point is that the ticket has a unique ID which is tied to the owner.

Normal non-digital paper train tickets just indicate "someone paid this" but aren't tied to a unique personal identifier.

But that id doesn't get transmitted anywhere as long as you are not checked for a ticket, which is rare. (And that's not saying that when you get checked it will collect personal non-ananomized data points, it doesn't.)

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