Does Openroaming require users to create an account? I'm not sure if this does.

At a first glance, Openroaming also seems to use "Passpoint"/WPA Enterprise, which not nearly all devices support, so at least a backup SSID makes sense.

OpenRoaming, like Eduroam, requires an Identity Provider (IdP). This would be something that you could call an account. At least you would only need to create this once and the WiFi operators wouldn't see the details of your account, only the IdP would.

WiFi4EU phase 1 isn't a federated WiFi network, it uses whatever the WiFi operator uses. This makes a shared SSID less relevant. Not sure if phase 2, which will be OpenRoaming like, is active yet.