[sschueller]

This was an issue in Switzerland initially with the introduction of the SwissPass (very ugly looking thing, at least the new one looks a bit better [1]) which no longer showed what it was (the old Abonement cards where translucent [2]) but was a card with a photo on it and you would have a ticket connected to that card which the conductor could check with their smartphones either via NFC or the qr-code on the back. The Samsung phones that where issues where slow to scan the cards via NFC.

Today you can also have everything on your phone which then gets scanned withe QR-Code. BTW, this code changes every few seconds so screenshots don't work. You can also instead of purchasing a ticket do something that is called "check-in" where you check-in before you get on the train and a GPS type ticket is issues. At the end of the day the best possible rate for you is then calculated and your are billed. Downside is, you need to be "tracked" by the train company for this to work.

However the process to inspect tickets is again as fast or faster than it was before. In fact when someone has paper tickets (specifically papers from non-Swiss ticket offices (France, Italy etc.)) it can take longer.

There is also a rule if you can't present your ticket in a timely manner it's considered invalid. This never happens but when the conductor yells tickets please, get your phone out.

[1] https://www.swisspass.ch/new-swisspass?lang=en

[2] https://hymnos.existenz.ch/wp-content/uploads/2010/08/DSC037...