Exactly. I was in Sweden recently and it's opressive how difficult it is to use cash. For everything it's only card or apps, I didn't even bother to get any local cash. But I had a few SEK from years ago and I couldn't use them.

In Portugal is not on the constitution but it's law, a business cannot force the client to pay by other means if the client has enough cash to make the payment for payments under 3000€ (above this you actually can't pay cash by the same law :P).