https://www.cnet.com/news/that-time-samsung-pay-on-galaxy-s9-literally-saved-my-day/

Only one thing worried me. I've used Samsung Pay all over the US, Asia and Europe, but I've never been forced to use it solo. I've always had the benefit of my credit and ATM cards as backup, and my driver's license for ID. Being forcibly removed from them, without any sort of safety net, would be a real-life test of mobile payment's power and influence. 

We always talk about leaving the wallet at home, but does the infrastructure exist to make that work? Could I really get through a day using Samsung Pay and nothing else? It's not Samsung's fault that the answer was no, not quite.