[nick2k3]

As an italian recently relocated to Belgium, I really wished I could use my italian eID for some very basic stuff like checking your covid-test result (you cannot access it if you don't have a GP, and you cannot have a GP if you don't have a national number, and you don't have a national number if you don't first register at the city hall) or interacting with institutions.

The procedure to obtain a eID is solid enough that the states should really leverage all the work done by another state to verify who you are etc, and allow you to interact with institution in a safe way.

IMHO it is one of the best things which could really define us as Europeans.