Originally Posted by
garykung
My point is to bring up how a system may work for an instance but not others, but not comparing one system with another system.
Also - each system is designed for different purposes. For instances, despite its payment features, Octopus is primarily a smartcard for public transportation. On the other hand, Alipay or Wechat Pay are basically electronic wallets.
Most, if not all, mainland cities with subway systems also have smart cards (many work in taxis, which I understand Octopus pretty much gave up on 10 years ago), but these are rapidly being replaced by apps that are connected to WeChat, Alipay, and directly to banks.