I always use my credit card when abroad. It is very convenient, give a good exchange rate, take away the hassle of using unfamiliar money.
In many countries, most recent experience in Poland, even taxi drivers take credit cards.
In many city transport services, most recent experience in Chicago, you can use your credit card as tap and go without waiting to buy tickets.
I was in USA for 2 weeks, cycling, in September. I had about 100 dollars in cash but did not use even half of it as credit card is accepted everywhere. I used it even for a coffee.