I mean, you can still USE cash, but I rarely see people doing so at any place that takes debit/credit (Which is 98% of places, maybe some ice cream trucks or whatever don't.)
Really the only issues I've noticed from it is once when the debit system went down on like Dec 23 and played merry havoc with christmas shopping. Made the news
I've had tenants pay their rent in cash a few times due to bank problems or something on their end, but that's always annoying, because then I have to make a special trip into the bank to deposit that crap.