The vendors you'd pay with Pix in brazil are typically the vendors who may not even accept cards at all, it's pix or cash.
(Although you CAN pay with pix at many supermarkets, I'd rate it as rare. Also useable for online payments, but you take the risk in case of fraud, unlike with creditcards)
Thanks for the information, reminds me of CashApp or something like that in the US. But just to be clear the context was, at least as I understood, moving to using an app instead of using existing credit card rails via Visa and Mastercard and that's just not going to happen because it's a worse experience (in Europe).
If you don't have the ability to accept a card at all, that's a different use case.