You will need both, but not a "bunch" of cash.
The one thing that has changed is during the Pandemic, Contactless payment, either by card or phone app exploded. I truly think that maybe there were incentives regarding the fees paid by stores to accept tap payments, as everyone urged me to tap, rather than insert my card (In Italy, Belgium, Netherlands, Germany, and Spain).
Tap is being used for even very small transactions, though as things normalize, I am seeing more places backslide a bit and want cash for small purchases.
Check your credit cards, hopefully they have a wi-fi looking symbol on them, indicating they will work for tap purchases. If you use Google Pay or Apple Pay at home, that should work as well.
As a comparison, post-pandemic I am using 10-20 euro a day, pre-pandemic, I used more like 50 euro a day. I could use my card more than I am, but still like cash for 2-3 euro purchases (water, a beer, glass of wine, etc.)