Interesting discussions in the comments regarding reuse, waste, QR codes, etc.
Worth bearing in mind that in the UK train stations have mixed NFC, QR and magnetic readers. The ones which are the least reliable are the magnetic readers which operate on paper cards. The NFC readers are used for pre-paid ticket cards and credit/debit cards. The QR scanners for so called "E-Tickets".
I don't really ever see anyone have problems with the QR tickets (they're static and distributed as PDF or pkpass). Likewise with NFC. Only the paper magstripe cards commonly cause problems.
Meanwhile in the Shanghai metro they use chip coins. Small, reusable and NFC.
I think these paper NFC things are a unique combination of non-reusable, prone to damage, prone to jamming.
Worth bearing in mind that in the UK train stations have mixed NFC, QR and magnetic readers. The ones which are the least reliable are the magnetic readers which operate on paper cards. The NFC readers are used for pre-paid ticket cards and credit/debit cards. The QR scanners for so called "E-Tickets".
I don't really ever see anyone have problems with the QR tickets (they're static and distributed as PDF or pkpass). Likewise with NFC. Only the paper magstripe cards commonly cause problems.
Meanwhile in the Shanghai metro they use chip coins. Small, reusable and NFC.
I think these paper NFC things are a unique combination of non-reusable, prone to damage, prone to jamming.
But they are cool.