"That’s because deep inside it’s secretly something like a mastercard maestro, no?"

Maybe? There is a maestro sign on it, but it is not a debit card.

But my point was, that I do not know, nor want to know all the details of banking communication. I want it to work.

It is a normal card around here and it does work in europe. So I never had the need to change, until now. So now I have a credit card, too and that is fine for me. But most other people here still don't, as most do not do international transactions.

So if Stripe wants to get into that market, they likely will have to adopt. No one here would offer stripe on their webshop - with only a few being able to use it.