Easy when shops start supporting them.

I've paid numerous time using the swiss counterpart, Twint, in small shops. For some like the farm I used to buy vegetables to it was their only supported payment besides cash because they deemed the card systems too expensive.

The same way chinese tourists can already pay with alipay in many retatail outlets in europe, you can already pay with such european systems on Aliexpress. More are probably comming.

Annecdata. Not reliably feasible.