[phillc73]

It’s happening already, as noted in my comment above. A fair number of venues in the UK no longer accept cash payments.

[dijit]

It’s very common in Sweden. There’s even tax incentives I believe.

“Kontantfri” is a sign I see very often.

[doikor]

Not really tax incentives but not having to pay some security company to come pick your cash every evening to store it securely in the bank and exchange the bigger notes for smaller ones so you can give change back turns out to be more expensive for smaller shops/cafes then paying whatever card transaction processor you use their ~1% fees.

So at the end of the day accepting cash is more expensive for small shops. (not 100% sure about Sweden but that is the case here in Finland).