Seen another way, companies will have to provide electronic payment options. Hopefully there's follow up incentives to make electronic payments appealing. Credit card cash back isn't still a thing in EU (or at least Germany). That said, I don't know which is generally safer, cash or card, but in my own experience I feel more secure traveling/walking around with my bank card that cash. It's 2019 and there's still several places in Germany where you have to pay > 50eur bills in cash.
> Credit card cash back isn't still a thing in EU (or at least Germany)
They will never be a thing in EU, under the current regulations. Cash back work because in the US credit cards charge very high transaction fees. IE: every time you make a payment, a portion of it goes to the credit card company. The The credit card company then gives some of that back to you (hence the name) to push you to use their cards instead of the competitors.
By law, the transaction fees in Europe are really low, so the credit cards company have nothing to give back to you. Credit card is also a far less profitable business in Europe than it is in the US, that is why you see far less ads for credit cards offers.
>> Seen another way, companies will have to provide electronic payment options.
This is already the case in Greece. Even "periptera" (equivalent to drug stores in the US or corner shops in the UK) have to accept card payments and issue receipts, which was unheard of a few years ago. This was explicitly imposed to curb VAT tax evasion I believe. It was a measure insituted by the previous government, of Syriza.