You won't be playing badminton at the clubs without cash.
Most people who pay me don't have bank accounts, it's either cash or money orders.
Gas for the car? Cheaper via cash. This becomes all the larger when gas prices are higher.
Car repairs? You'd be a fool to pay electronically, when the discount for cash gives you $20 back for small services, and multiples of that for large.
Drinks at the bar? Cash means faster service, more value to your tips, less problems/complaints on tabs.
Meanwhile, every other month I know folks who have dropped phones in the toilet, lost, broken, had their phone stolen, or the person paying for their phone service doesn't, so it gets shut off. Only once in my dozen years of doing my job has a client lost her purse.
I laugh every time these articles get posted here, as there are entire segments of society for whom this would not function.