I think they are even more useful in Taiwan. Every single transit system across the entire island that I’ve ever encountered accepts EasyCard (悠遊卡). Even ferries. So does every convenience store, and even a lot of proper restaurants and stores. They are also fast, like you don’t even have to break your strike while passing the turnstiles to enter the metro.
>the entire island Is it China's influence that Taiwan is not being referred to as a country.
If OP never set foot on these other islands it is simply more accurate to say the island rather than the country. But this is just an HN comment, OP might not have given the island/country word choice a second thought.