I also find it incredible that German trains in most cities still use paper tickets exclusively (where as many other cities have payments cards). Although some

I also find it incredible that German trains in most cities still use paper tickets exclusively (where as many other cities have payments cards). Although some cities do let you use a Handy (mobile phone), so it's like they skipped over the card base tech entirely. (I still prefer cards. They still work if my battery dies or I leave my phone somewhere).