All of these IDs in the EEA are based on a common set of EU requirements, and in theory that means multiple providers, but in practice in many countries the set of providers is small and with feature gaps. E.g. Norway has several providers, but they provide different levels of security and features, which means in practice most people rely on BankID...

10-20 is fantastic in comparison. Even if people don't have more than one it at least reduces the blast radius..