With samsung pay, you can store multiple cards, so leave that bulky wallet at home, with security features like biometric security, nobody can purchase using your phone without you even if they know your bank pin. Safer option
With most devices that have mobile pay options, it requires NFC speed points. And in south Africa, there are a very high amount of old school swipe-only card speed points, so if you forgot your card but at home and you're at a shop that has the old school card machine, what will you do?? Go back...