(a) Estonia is a very young country, so they could start from scratch
(b) Estonia has very few citizens. At a guided tour in Tallinn the guide said that many of us came from cities more populous than their country. :-)
(c) Estonia is more... adventurous in some regards. They have a National DNA Database, for example. Try selling that in the country of the Gestapo and the Stasi.
(d) But first and foremost, it is great that there is a smallish country experimenting with all kinds of new stuff. The rest of Europe will benefit a lot, just by watching them and picking some of the things they already implemented and tested.
The Gemalto overview is fantastic: https://www.gemalto.com/govt/inspired/eid-in-germany
https://www.bsi.bund.de/EN/Topics/ElectrIDDocuments/German-e...
Edit: trying to submit the Gemalto Dec 2019 update as a new story but I seem to be banned from submitting stories. Merry xmas HN.
I'm almost surprised they haven't gone the same route as Estonia, but there are lots of federated systems so it might just be inertia.