Too late. The list of places that do not accept cash is growing. It's a common restriction at food trucks for example. Maintaining a Square reader is just so much easier than a cash box and a trip to the bank, plus the security concerns.
It's too bad. I actually prefer cash. But I understand where merchants are coming from.
The list of places I'm willing to solicit is shrinking, since I only do business with people who accept cash as an option, even if I don't happen to be paying with cash at the time.
Merchants are free to make their choices, as are consumers. The problems really start when the government steps in and removes your freedom at the point of a gun.
It's too bad. I actually prefer cash. But I understand where merchants are coming from.