For interpersonal transactions I don't really see the advantage here, but for commercial use cases it's got a solid product and purpose.
Wero doesn't stand to benefit much from payment fees as European payment fees are already rather slim compared to, for instance, American ones (crazy things like percentages of purchase price with a minimum amount!).
Usually these systems raise their fees after being established, sometimes even higher than Visa/Mastercard.
Brazil's Pix is something else. It wasn't created by private entities to make money.
As barely anyone has a credit card and very people want to deal with the faff of manually entering billing codes or account numbers, iDEAL usage is near universal for online payments. I don't recall fees ever going up as an end customer.
We need instant, free SEPA transfers around the clock. Switzerland is not part of SEPA but IBAN is used so it is trivial to send payments to foreign accounts that have an IBAN.
I always say that the day Trump decides to block Visa/MasterCard outside the US is the day we get instant payments and finally get rid of cards.