fiat as a technology has a history of around 600 years if you count the beginning as the chinese invention of bank notes and the history of commodity currencies is much longer and persists in the way that people prefer cash, even with the incredible amounts of resources being diverted to push people onto electronic payment networks 

those electronic payment networks, and the CBDCs they want to replace them with, are going to have problems with downtime, and the more people's weeeks get ruined the more interested they become in networks that don't have downtime caused by human error

this is how technology advances, and it's inevitable