I think most people miss that the biggest hurdle is political. Once a political will exists, this system will come to exist.

Fun fact: until about a year ago it was not possible to pay using normal debit cards in most Dutch shops, you had to have a local card. I distinctly remember that AH, Vomar and Jumbo would typically reject foreign cards while Lidl and Dirk would typically accept them. Of course there were exceptions, but that was the rule of thumb.

Most Dutch people were unaware of the issue (because Dutch cards worked abroad), and those who were, were fully convinced that it's because Dutch system is objectively better (it wasn't, it was just a separate network). Then in like 2024/2025 Visa and Mastercard finally retired their special V-Pay and Maestro brands, and now most terminals in the Netherlands accept most normal cards.