At the same time you’re underestimating it.
Before covid almost no small businesses would offer card payment; now it’s common.
Sure there are some that are against digital payments and they won’t accept Wero neither, but I would argue the number is very small. And sure in bars/clubs/nightlife it’s cash only but that also won’t change - it’s for tax reasons.
People don’t like PayPal and only use it for the lack of a better alternative. EC is widely used and I bet that Wero will be as well.
Source: lived last 15 years in Berlin