Originally Posted by bobbytables

The use of contactless/RFID tech alone isn’t that big a deal really. It’s the use of the existing (visa/mc/amex/etc) payment system that makes London streets ahead. Why should I have to bother getting yet another card just to ride public transport?

I believe you can register on the Transport for London website with the payment card you want to use and then you can buy a custom “travelcard” - not actually a card but just associated to your payment card. I’m usually there for a bit longer so I don’t bother and it works out all the relevant fare caps automatically.